You're going to have to write a book one day with all the knowledge you're getting from doing these stock pot refining videos. I remember the first one you did and how daunting it was. One day the name Sreetips will be spoken alongside C.M Hoke.
Way to go Sreetips! Good clean start. Good clean product to work with. Can't wait to see how much precious metals you get back from a year of overhead from all the decanting and other runoffs!
It will never stop making me wince when watching you pour the copper nitrate from your silver bucket into the iorn laden bucket. I just keep thinking about how much nitrates I could recover from that. lol I truly envy you in that you live somewhere that HNO3 isn't controlled like drugs.
Just a thought but if you need to pull out liquid from a solid when you get the mud push in a tea strainer into the mud and you be able to a lot more as liquid will collect in the strainer. Great video
Mstr. Ch., this is a nice series brother...Looking forward to a nice long video next getting all that black goop down to a nice purplish/brown mud...Then a beautiful large ingot...
Kevin this is looking beyond awesome and a very significant recovery at the end. That mud at 5:45 is just delicious - big chunks of money right there :). I showed the wife and kids and they all said "ewwwwww", but to me, that is precious metals porn.
Haven't commented lately, but I have watched every vid from the last time I commented. I was stoked to see Jason from Mount Baker Metals used your vids in practice and gave ya a shout-out. Lovin all the content Kev!!!
at 1:32 maybe it’s a good idea to pass the liquid through a filter, and see if you get anything (esp the power see is so fine). If the mixture clogs up the filter, it could mean there are more metals to be recovered!
Your black waste liquids, would it be beneficial to run them through a filter before returning them to a stockpot? It might be interesting to see what any solids that filter out might melt down into.
I've been wondering for a while now, whereabouts in your workflow are any traces of zinc and nickel removed? Especially with the scrap and jewelers clean-up stuff.
Awesome video I was wondering what about turning the whole amount of solids melted and tested for precious metal content in gold concentrates aswell as platinum and palladium
What do you do with the cemented copper in the pot with the angle iron? And what do you do with the iron-solution you get in the process of cementing out the copper? It's very interesting to see you refining every last bit of something, as someone who lives in germany knowing a lot about chemistry aka working as a laboratory dude, but is hand-tied on purchasing chemicals, especially concentrated acids and other chemicals hazardous to the environment. Here at our place, we have to neutralise every solution we intend to dump it into canalisation, as well as getting all metals out, as good as we can except sodium. So a solution with iron has to set basic, the emerging ironhydroxide coming out of solution has to be filtered off and if the solution get's acidic again do the same process again and again until all the iron which want to come out of solution is filtered off and the solution itself is near pH-neutral. That's why i asked, what you do with the waste solutions containing iron.
awww I have a kilo of melted down computer guts.. it looks gold(ish) I am thinking it is a lot of silver or maybe tin/lead? it rings, will not oxidize and acid does not affect it (eliminates brass?)
Surely it's just easier drying the mud off and cupelling it in Portland cement with lead or bismuth then going to nitric for the silver and AR for the PGMs?
Since platinum is a surface catalyst, is some of trouble working with it that it and other PMGs are going into solution and reforming (falling back out of solution) on the remaining solids at a similar rate?
Could you please explain the origin of your term "cement out"? I realize that you're refering to the process of pulling the metals out of solution but i just find it a curious term.
First .. for the very first time .. Hope you get to see this .. I really enjoy your vids .. are like therapy to me. :D Wish you the best Mr.Sreetips ! From Romania !
So if I understand, you have a stockpot full of old whatever metal and acid. You put copper pieces to kick all the silver/gold/PMG out of the old nitric acid solution. You separate the old solution from the mud, then throw iron in the old solution to kick the copper out (I guess iron with nitrate is easier to manage). Not sure where the silver went. Or is it in a separate stock pot? I wonder what the HCL boils brings in solution...
I keep silver away from my gold refining stock pot. It’s a separate container for silver. But all the copper in solution goes through the waste treatment bucket that’s full of iron.
@@sreetips Do you keep the copper that cements out to later use in the Nitric solutions to cement out the silver? I don't think I've seen what you do with the cemented copper... or is it too impure to use? Edit: Oops.. I wrote too soon.. just noticed someone pose the same question a few hours ago.. d'oh! 😁 But couldn't you use the copper to en-quart gold in future refinings?
I was wondering if you ever get samples analyzed for purity by an outside laboratory. I routinely used Galbraith laboratories for my external analysis but I am not sure they are the best for the kind of precision you need. (Retired PhD chemist)
I’ve sent samples of my silver to Guardian Labs in the UK. They were referred by pro refiners on the goldrefiningforum.com. The fire assay comes back three nines every time. Except once. I ran some pure silver crystal back through the cell a second time. Sent a sample to them for ICP analysis. That came back greater than five nines fine. That’s >99,999 parts per one hundred thousand pure silver.
I have used ICP and trust this analysis. >5 9's pure is fantastic, Have you sent any sponge gold? You don't have to use much of it in this form. Sounds like you have a good lab to work with. BTY, you have really good analytical chemistry transfer technique. Normally I would have carried out your reactions using a 10% excess of reagent based on the stoichimetry of the reaction. However, your methods works just as well though.
I’d have to review it. It depends on where I am in the process that determines what reagent I use. And if it’s platinum, then it’s a much different deal. Refining gold and silver are like a cookie recipe compared to platinum group metals.
@@sreetips Thanks for your comments! I specifically refer to the stockpot treatment. I had mine sitting for months, with surplus copper metal and air bubbling. I am just about to decant and rinse the residue. Would you recommend hydrochloric or nitric? Hydrochloric doesn't dissolve copper, but nitric could dissolve gold if there is some chloride in the residue.
@@sreetips Thanks Sreetips, your experience is very much appreciated! Yes, I think that dilute nitric acid + boiling is the best way to wash the stockpot residue. I would rinse with plenty of water beforehand, to get rid of any chloride ions (chlorides are all very water soluble, except for silver, mercury and lead chloride).
@@sreetipsAssuming the filtrate won't clog things up I still think it would be worth a look. Depending on the other reactions you run it can save a lot of manual work and also reduce the number of purification runs. For example you could probably use it for inquarting. Silver nitrate shouldn't distill over with the nitric acid so you'd just need to add a slight excess of acid initially and then let it do its thing for an hour or so. The remaining gold will be contaminated with nitric acid but that won't need rinsing if it's going to be dissolved in aqua regia anyway. Actually on further thought it could be problematic. You'd need to use concentrated acid otherwise the majority of the distillate will just be water, running the risk of nitrating the filter paper.
Hello I'm in mayland and I'm looking for a refiner for my scrap gold I've scrapped over 100 tvs and some Cisco systems also tons of tablets and phones any tips on where to sell my scrap precious metals?
I understand that gold stannate alloy will not precipitate in the stockpot from what I heard, this is also presumably a problem of loosing gold, do you know how this "lost gold" could be recovered and if you think it is a problem?
I’ve never worked with gold stannate alloy. The gold should be in there, but not much. I try to collect gold in my temporary waste containers. When I empty those temp containers into the stock pot, I try to keep as much gold as possible in my temp container so I can recover it easily.
@@sreetips "I feel good about it. I believe that the copper is gone." Because of the sieving, yes, a lot has gone. Because of the HCL boils, no, I don't think so. But that will have cleared out a lot of the organics that plagued you before.
good work, i was sad you didnt keep going because you had me into it! lol, cant wait for more. I'm curious if you have any thoughts on what's making that motor oil so black ? id say you were thorough enough with the rinsing that it obviously wasn't any precious metals, but being so dang black makes me curious what it could be since you always refine very similarly and thorough and nothing yu do says you should end up with so much deep black material? think maybe it could be some odd long term chemical reaction we aren't aware of? or maybe a byproduct of the plastic bucket reacting slowly over time with the acids or metals? maybe even the dye used to color the plastic bucket reacting somehow? it has me very curious indeed. lol, love the videos though keep up the good work.
Do you mix the silver waste and the gold waste? Because if you have rolled gold or plated gold on silver and you will get some gold in your silver waste
No, I keep gold waste away from my silver refining stock pot. And I keep silver away from gold refining waste. Any gold in the silver will get trapped in the anode filter when the silver gets run through the silver cell. Then, when I recover the slimes from the silver cell anode filters, I’ll get the gold.
Sreetips I really like your videos and Ive been watching for a while. Oi really appreciate the annunciation, not too sure people realize. Listen to him at double speed and you can understand every word and see what im saying.
Copper pipe is cheap, compared to the time and materials consumed in the process of refining and melting the copper into bars. Plus, copper pipe has more available surface area to react with the waste juices.
I wonder what he does with the copper then... rolling it into sheet metal or foil wouldn't be that difficult, but maybe there's a use for powdered copper.
@@DFPercush I can’t really answer for sreetips, but my guess is that he lets it pile up until he has a nice big pile of it, and watches the price that his local scrap metal center is paying. When it gets to a sufficiently high enough price, load it up and haul it in.
@@sreetips really? I’ll be darned. Maybe it might be worth melting it down at some point after all. Of course, you’d want to use a foundry for that, rather than a torch and a melt dish. Mark Presling recently did a series of videos where he converted his propane foundry to use diesel fuel, which burns hotter and cheaper than propane. Maybe an idea for new material for your channel? Lol (Just kidding… you’ve got your hands full with making big bucks from gold & silver refining. No need to go after copper chump change, too)
Platinum and palladium are within my capabilities. The other four metals are far beyond me. Most big refiners here in the USA won’t give credit for those. I don’t know why. It’s an enigma to me.
You're going to have to write a book one day with all the knowledge you're getting from doing these stock pot refining videos. I remember the first one you did and how daunting it was. One day the name Sreetips will be spoken alongside C.M Hoke.
Wow! Thank you.
Yes sir you do
Great collection from your stockpot, that black sludge has cleaned up nicely with some acid and distilled water boils. 👍
11:22
This is going much better than the first time you did the stock pot it's looking so much better thank you for sharing this with us six stars sir
Usually this process takes me at least 4 days. The process is long, but at the end there will be an excellent prize in hands, shiny and heavy 🙂👌
My new drinking game. Every time Sreetips says putting it up on the heat. I take a sip .
Do this instead: every time sreetips says “stock pot”
There’s a name for making it up as you go, it’s scientific laboratory testing. This is proper science involving our favorite elements! Nice!❤
I can’t tell you how much I love coming home from a long day at work to a new Sreetips video. My god I’m sooooo ready to relax!
These are my favourite refinings of all. The unknown quantity gives it an element of suprise
Last time I seen gunk like that it comes out of an oil pan of an old Chevy lolol
Way to go Sreetips! Good clean start. Good clean product to work with. Can't wait to see how much precious metals you get back from a year of overhead from all the decanting and other runoffs!
It will never stop making me wince when watching you pour the copper nitrate from your silver bucket into the iorn laden bucket. I just keep thinking about how much nitrates I could recover from that. lol I truly envy you in that you live somewhere that HNO3 isn't controlled like drugs.
Как всегда профессионально и без суеты.
Пользуюсь некоторыми твоими методиками, доволен, спасибо.
Just a thought but if you need to pull out liquid from a solid when you get the mud push in a tea strainer into the mud and you be able to a lot more as liquid will collect in the strainer. Great video
Mstr. Ch., this is a nice series brother...Looking forward to a nice long video next getting all that black goop down to a nice purplish/brown mud...Then a beautiful large ingot...
Kevin this is looking beyond awesome and a very significant recovery at the end. That mud at 5:45 is just delicious - big chunks of money right there :). I showed the wife and kids and they all said "ewwwwww", but to me, that is precious metals porn.
That's an exciting one! Looks perfect with those cleaning boils.
Just Fantastic editing Mr Tips😊. Really love your work.. Thanks for.sharing with us.
Haven't commented lately, but I have watched every vid from the last time I commented. I was stoked to see Jason from Mount Baker Metals used your vids in practice and gave ya a shout-out. Lovin all the content Kev!!!
at 1:32 maybe it’s a good idea to pass the liquid through a filter, and see if you get anything (esp the power see is so fine). If the mixture clogs up the filter, it could mean there are more metals to be recovered!
Positive vibes from little Rhode Island
Conner is here and I appreciate the time you take brother.
just about ready to make a cup of forbidden coffee! thank you.
Your black waste liquids, would it be beneficial to run them through a filter before returning them to a stockpot? It might be interesting to see what any solids that filter out might melt down into.
There’s some solids in there.
just love all your informational content you put out.
And the weird thing is the fact that nearly everything in that frankly horrible looking mud that isn't water is metal...
hahahaha who else yelled out 'stanus!' for the first nearly clear wash solution.
Thanks for the demonstration. Interesting as always.
That powder is probably worth a good amount to firework manufacturers then again on a large scale production I’m sure it’s pretty easy to get
All that black liquid i usually pass thru papper towel filter. It works very good
I've been wondering for a while now, whereabouts in your workflow are any traces of zinc and nickel removed? Especially with the scrap and jewelers clean-up stuff.
Zinc and nickel will come out with nitric boils.
Heck yeah 2 stock pots. Shoot for the stars sir 🎉
Awesome video I was wondering what about turning the whole amount of solids melted and tested for precious metal content in gold concentrates aswell as platinum and palladium
What do you do with the cemented copper in the pot with the angle iron? And what do you do with the iron-solution you get in the process of cementing out the copper? It's very interesting to see you refining every last bit of something, as someone who lives in germany knowing a lot about chemistry aka working as a laboratory dude, but is hand-tied on purchasing chemicals, especially concentrated acids and other chemicals hazardous to the environment.
Here at our place, we have to neutralise every solution we intend to dump it into canalisation, as well as getting all metals out, as good as we can except sodium. So a solution with iron has to set basic, the emerging ironhydroxide coming out of solution has to be filtered off and if the solution get's acidic again do the same process again and again until all the iron which want to come out of solution is filtered off and the solution itself is near pH-neutral.
That's why i asked, what you do with the waste solutions containing iron.
I toss the copper. The iron solution is treated with NaOH
awww I have a kilo of melted down computer guts.. it looks gold(ish) I am thinking it is a lot of silver or maybe tin/lead? it rings, will not oxidize and acid does not affect it (eliminates brass?)
Surely it's just easier drying the mud off and cupelling it in Portland cement with lead or bismuth then going to nitric for the silver and AR for the PGMs?
Non of the professional refiners that I learned from used cupel. So I never learned it.
I keep silver away from my gold refining stock pot.
Gooood afternoon from central Florida! Hope everyone has a great afternoon!
Goooood afternoon!
I mentioned copper and such metals as a hobby. Couldn't you recover the copper from the iron and make bars or would it not be a cost effective step
It would cost more than the copper is worth.
When’s part 3 we are looking forward to seeing the results; how much gold v platinum group is the question.
Since platinum is a surface catalyst, is some of trouble working with it that it and other PMGs are going into solution and reforming (falling back out of solution) on the remaining solids at a similar rate?
Quite possibly. The trouble with platinum group metals is: they don’t cooperate!
Could you please explain the origin of your term "cement out"? I realize that you're refering to the process of pulling the metals out of solution but i just find it a curious term.
This is a term used among refiners. Any refiner will know what it means.
First .. for the very first time ..
Hope you get to see this .. I really enjoy your vids .. are like therapy to me. :D
Wish you the best Mr.Sreetips !
From Romania !
Thank you!
So if I understand, you have a stockpot full of old whatever metal and acid. You put copper pieces to kick all the silver/gold/PMG out of the old nitric acid solution. You separate the old solution from the mud, then throw iron in the old solution to kick the copper out (I guess iron with nitrate is easier to manage). Not sure where the silver went. Or is it in a separate stock pot? I wonder what the HCL boils brings in solution...
I keep silver away from my gold refining stock pot. It’s a separate container for silver. But all the copper in solution goes through the waste treatment bucket that’s full of iron.
@@sreetips Do you keep the copper that cements out to later use in the Nitric solutions to cement out the silver? I don't think I've seen what you do with the cemented copper... or is it too impure to use?
Edit: Oops.. I wrote too soon.. just noticed someone pose the same question a few hours ago.. d'oh! 😁 But couldn't you use the copper to en-quart gold in future refinings?
@paulslund1 it’s contaminated with other metals.
@@sreetips Ah.. so I take it that it's not worth the time and cost to refine to be re-used?
I was wondering if you ever get samples analyzed for purity by an outside laboratory. I routinely used Galbraith laboratories for my external analysis but I am not sure they are the best for the kind of precision you need. (Retired PhD chemist)
I’ve sent samples of my silver to Guardian Labs in the UK. They were referred by pro refiners on the goldrefiningforum.com. The fire assay comes back three nines every time. Except once. I ran some pure silver crystal back through the cell a second time. Sent a sample to them for ICP analysis. That came back greater than five nines fine. That’s >99,999 parts per one hundred thousand pure silver.
I have used ICP and trust this analysis. >5 9's pure is fantastic, Have you sent any sponge gold? You don't have to use much of it in this form. Sounds like you have a good lab to work with. BTY, you have really good analytical chemistry transfer technique. Normally I would have carried out your reactions using a 10% excess of reagent based on the stoichimetry of the reaction. However, your methods works just as well though.
Nice video! next step is using hot concentrated nitric acid to remove palladium, rhenium, osmium and any silver chloride in the solids?
I’m that far along yet.
Nice freshly repainted fume hood too !!
I know you consider copper as a waste product but have you thought about pouring impure bars for sale?
No
I am confused - in a previous video you cleaned up the solids with dilute nitric acid to remove copper. Now you use hydrochloric acid?
I’d have to review it. It depends on where I am in the process that determines what reagent I use. And if it’s platinum, then it’s a much different deal. Refining gold and silver are like a cookie recipe compared to platinum group metals.
@@sreetips Thanks for your comments! I specifically refer to the stockpot treatment. I had mine sitting for months, with surplus copper metal and air bubbling. I am just about to decant and rinse the residue. Would you recommend hydrochloric or nitric? Hydrochloric doesn't dissolve copper, but nitric could dissolve gold if there is some chloride in the residue.
Stock pot refine is not easy. I think I started with nitric boil to remove excess copper and the palladium.
@@sreetips Thanks Sreetips, your experience is very much appreciated!
Yes, I think that dilute nitric acid + boiling is the best way to wash the stockpot residue. I would rinse with plenty of water beforehand, to get rid of any chloride ions (chlorides are all very water soluble, except for silver, mercury and lead chloride).
I love the stock pot vid's. Thanks for sharing this sreetips. ;^)
Could you not use a kumagawa/soxhlet extractor to rinse the filtrate? Seems like an awful lot of acid to use otherwise.
The acid is about $10 per gallon.
@@sreetipsAssuming the filtrate won't clog things up I still think it would be worth a look. Depending on the other reactions you run it can save a lot of manual work and also reduce the number of purification runs.
For example you could probably use it for inquarting. Silver nitrate shouldn't distill over with the nitric acid so you'd just need to add a slight excess of acid initially and then let it do its thing for an hour or so. The remaining gold will be contaminated with nitric acid but that won't need rinsing if it's going to be dissolved in aqua regia anyway.
Actually on further thought it could be problematic. You'd need to use concentrated acid otherwise the majority of the distillate will just be water, running the risk of nitrating the filter paper.
How did you start the siphon at 1;29? I hit back 20 times! lol
I don’t think I siphoned, I used a vacuum bottle.
As always, great work Senor Chief
Hello I'm in mayland and I'm looking for a refiner for my scrap gold I've scrapped over 100 tvs and some Cisco systems also tons of tablets and phones any tips on where to sell my scrap precious metals?
It’s going to be tough finding someone to robot because electronic scrap is low yielding.
I understand that gold stannate alloy will not precipitate in the stockpot from what I heard, this is also presumably a problem of loosing gold, do you know how this "lost gold" could be recovered and if you think it is a problem?
I’ve never worked with gold stannate alloy. The gold should be in there, but not much. I try to collect gold in my temporary waste containers. When I empty those temp containers into the stock pot, I try to keep as much gold as possible in my temp container so I can recover it easily.
18:46 just curious, if you put some powerful magnet aside a beaker when it's cooling, would there be some metallic residue?
There should not be anything magnetic in there.
@@sreetips yeah, that's exactly why I'm asking, because you could display practical knowledge rather then theoretical
Ok, I’ll check it with a magnet. You never know.
The density of platinum is 21.45 grams per cubic centimetre. As a comparison, the density of gold is 19.3 grams per cubic centimetre.
21.45 g of these solids poured in cubic centimeter mold might be interesting as a dimensional baseline - seeing the dial caliper measurement.
is Streetips making a lava lamp?... no I think your really onto something cleaning up the solution like that!
I feel good about it. I believe that the copper is gone.
@@sreetips "I feel good about it. I believe that the copper is gone."
Because of the sieving, yes, a lot has gone. Because of the HCL boils, no, I don't think so. But that will have cleared out a lot of the organics that plagued you before.
good work, i was sad you didnt keep going because you had me into it! lol, cant wait for more. I'm curious if you have any thoughts on what's making that motor oil so black
? id say you were thorough enough with the rinsing that it obviously wasn't any precious metals, but being so dang black makes me curious what it could be since you always refine very similarly and thorough and nothing yu do says you should end up with so much deep black material? think maybe it could be some odd long term chemical reaction we aren't aware of? or maybe a byproduct of the plastic bucket reacting slowly over time with the acids or metals? maybe even the dye used to color the plastic bucket reacting somehow? it has me very curious indeed. lol, love the videos though keep up the good work.
Base metals in solution will turn black like motor oil.
@@sreetips oh so it is like, iron, lead, tin, nickel, manganese, zinc soup?
Correct
Do you mix the silver waste and the gold waste? Because if you have rolled gold or plated gold on silver and you will get some gold in your silver waste
I do not commingle silver refining waste with gold refining waste. I have two separate stock pots for each.
@@sreetips do you try to recover any gold from silver stock pot? Given some might go into it via plating or jewelry with gold mixed in
No, I keep gold waste away from my silver refining stock pot. And I keep silver away from gold refining waste. Any gold in the silver will get trapped in the anode filter when the silver gets run through the silver cell. Then, when I recover the slimes from the silver cell anode filters, I’ll get the gold.
If there's any silver in it will the hydrochloric boil remove it from the gold
Small amounts, yes.
I know it's early but I'm anxious to see the yields!
Hello from Poland
I see im not the only one
Hello
76👍's up sreetips thank you for sharing
Sreetips I really like your videos and Ive been watching for a while. Oi really appreciate the annunciation, not too sure people realize. Listen to him at double speed and you can understand every word and see what im saying.
New street tips.....while working......WIN
A great start sir 👍
I'm curious what was the stuff floating on top?
Probably some kind of salt
اخوي طيب ابي استخراج الذهب من التراب او صخور
Question .. what y l fo with the used HCL from these boils??
Put it through waste treatment.
Sweet, looking good Sreetips.
Wow nice, cant wait and see what it yields.
Hello sir, PGMs is some higher league... Looking forward turning clean mud into real value...
You should make your own long copper bars insted of using pipes
Copper pipe is cheap, compared to the time and materials consumed in the process of refining and melting the copper into bars. Plus, copper pipe has more available surface area to react with the waste juices.
I wonder what he does with the copper then... rolling it into sheet metal or foil wouldn't be that difficult, but maybe there's a use for powdered copper.
@@DFPercush I can’t really answer for sreetips, but my guess is that he lets it pile up until he has a nice big pile of it, and watches the price that his local scrap metal center is paying. When it gets to a sufficiently high enough price, load it up and haul it in.
They won’t touch it. No one will.
@@sreetips really? I’ll be darned. Maybe it might be worth melting it down at some point after all. Of course, you’d want to use a foundry for that, rather than a torch and a melt dish. Mark Presling recently did a series of videos where he converted his propane foundry to use diesel fuel, which burns hotter and cheaper than propane. Maybe an idea for new material for your channel? Lol
(Just kidding… you’ve got your hands full with making big bucks from gold & silver refining. No need to go after copper chump change, too)
Nice and clean now 😊
Hi sreetips. We have some iridium metal.... we cannot sell it in turkey.
Could you help us?
Platinum and palladium are within my capabilities. The other four metals are far beyond me. Most big refiners here in the USA won’t give credit for those. I don’t know why. It’s an enigma to me.
@@sreetips thank you
Excellent.
Your acid bill must be insane? is it worth it?
Ten bucks per gallon. HCl is not that expensive.
You can reuse the copper From your stock pot, Why didn't you do that
It’s contaminated
What does it cost you to make the gold come out
I’ve never tried to calculate that
Excellent I'm excited 😊
So, black gold?!?!?!
This is going to be interesting come on ole #3
So much time saving with syphoning. Just that one comment and we all save time. Id shout out but I dont remember the name.
Get a centrufuge.. it will cut your settling time by 80%...
Got one.
Good luck 👍
رائع جدا 👍🏾👍🏾
Part 2 pliiiiiiz
LET HIM COOK
Exited for next video lol
Abi by way of extracting gold from rock dust
I’ve never tried extracting gold from rock dist
Awesome
👍
SCIENCE