Beautiful! I enjoy your videos. I'm in Hampshire and turn to crystals as the only interesting thing I can find locally. Like you I have also had a poke around a river in the South West, which was certainly more interesting than our local geology although I only have a tiny bit of black sand/mineral fines to show for it. Tempted to try and take some pics through the loupe. Keep up the good work.
Thanks! I think Hampshire is quite similar to Surrey, with some chalk, sandstone, chert, and crystals. When I'm in the South-West I too notice the variety of igneous rocks and minerals. These photos were just taken on my (cheap!) phone and enlarged, so maybe that's another option. I was amazed at the picture quality you get nowadays! :o)
Thats a beautiful specimen. You are holding half of a geode. A chert nodule formed by a warm silica-rich fluid deep underground which has infilled a void or replaced another mineral, probably within the chalk. The chert has been deposited first, but the void has not infilled totally and the quartz has had time to crystallise those beautiful 'euhedral' crystals. Or else the solid chert has been dissolved away over time and the void filled by the mobilised silica from the chert. Chert is so hard that holding in a hand would never cause any wear, so I dont think its been fashioned by man, but it looks all natural to me. Either way, you have a superb mineral there. If you can get in really close, check if the fine black material amongst the Quartz may also also be crystals, maybe goethite or magnetite.
Thanks Rob - that's interesting info. I had to look up 'euhedral' so I've learnt something new! (It means a crystal that can form into its natural shape). Yes, I agree I am speculating its (human) history, but there is less doubt about its geological background. I'm starting to think the quartz crystals may have formed early in the nodule's life, which makes them many millions of years old.
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Beautiful! I enjoy your videos. I'm in Hampshire and turn to crystals as the only interesting thing I can find locally. Like you I have also had a poke around a river in the South West, which was certainly more interesting than our local geology although I only have a tiny bit of black sand/mineral fines to show for it. Tempted to try and take some pics through the loupe.
Keep up the good work.
Thanks! I think Hampshire is quite similar to Surrey, with some chalk, sandstone, chert, and crystals. When I'm in the South-West I too notice the variety of igneous rocks and minerals. These photos were just taken on my (cheap!) phone and enlarged, so maybe that's another option. I was amazed at the picture quality you get nowadays! :o)
Thats a beautiful specimen. You are holding half of a geode. A chert nodule formed by a warm silica-rich fluid deep underground which has infilled a void or replaced another mineral, probably within the chalk. The chert has been deposited first, but the void has not infilled totally and the quartz has had time to crystallise those beautiful 'euhedral' crystals. Or else the solid chert has been dissolved away over time and the void filled by the mobilised silica from the chert.
Chert is so hard that holding in a hand would never cause any wear, so I dont think its been fashioned by man, but it looks all natural to me.
Either way, you have a superb mineral there. If you can get in really close, check if the fine black material amongst the Quartz may also also be crystals, maybe goethite or magnetite.
Thanks Rob - that's interesting info. I had to look up 'euhedral' so I've learnt something new! (It means a crystal that can form into its natural shape). Yes, I agree I am speculating its (human) history, but there is less doubt about its geological background. I'm starting to think the quartz crystals may have formed early in the nodule's life, which makes them many millions of years old.
Just wanted to appreciate this comment - thanks for sharing your knowledge.
Wow nice
Thanks!
Apakah ada pembeli atau kolektor
Sorry - it is not for sale.
Hii
Hi!
Tempatt saya banyakk batu ini
Semoga berhasil menemukan beberapa kristal yang bagus! Good luck finding some nice crystals! :o)