Sapphires From Montana - A Historical, Geological, and Gemological Overview

SOCGEMS Presents: Sapphires From Montana - A Historical, Geological, and Gemological Overview with Dr. Aaron Palke, Senior Research Scientist, GIA (Gemological Institute of America).
Montana’s Yogo Sapphires Unique Gemology
The first Yogo source was discovered in 1895 and by the turn of the century, production averaged 400,000 carats a year.
The mine site is located within a long dike (a geological formation of volcanic rock layered above older, pre-existing rock) that held other sapphire deposits.

[@jameswelch1054]

Very interesting show. Thumbs up!

[@amberm2777]

I honestly think the unheated ones are prettier. I have some yogo Sapphire that I use to set on small rings and stud earrings and Its one of my favorites.my customers love it too

[@iiniijewelry]

All yogos are heated. They’re mined from a limestone dyke via explosives. Also why there aren’t large stones. The owner, Don Baide, of Bozeman, doesn’t allow tours either. It would be cool though. Yogos are very nice.

[@jakeyjakey4018]

Love the video

[@rickdavis8854]

Thank you very informative

[@to-kt9og]

Super video sir......

[@davidgee11]

You could start a business of wall prints of some of those magnified stones. Much nicer than those sold on Amazon!

[@albertnawab9211]

We are commercial cutters of Montana
Sapphires in brilliant cut and in calibrated sizes. If you wish to have
your stones faceted, pls kindly send to:
GPO Box 1142, Bangkok, Thailand.
@$0.75 per pc only for small sizes.
Satisfaction guaranteed.

[@sergioortega5869]

hello. good day everyone I ask for reports. how much. could be worth a Sapphire montana of more than 20 carats cushion cut if anyone knows give me your information thanks friends

[@iiniijewelry]

Size doesn’t matter necessarily. Stones are valued by the four C’s. Cut, clarity, carat and color.

[@bryanbressem5026]

Any trapiche or pink orange padi‐--?

[@nookymonster1]

They show up often enough to make it interesting.

[@iiniijewelry]

Padparadsha?

[@kellyjohnson2517]

Nice stones but all most all sapphires are heat treated

[@albertnawab9211]

We are commercial cutters of Montana
Sapphires in brilliant cut and in calibrated sizes. If you wish to have your stones faceted, pls kindly send to:
GPO Box 1142, Bangkok, Thailand.
@$0.75 per pc only for small sizes.
We buy clean rough stones.
Satisfaction guaranteed.
45 years of reliable services.
Delivery within 30 days.

[@iiniijewelry]

If most of the stones you encounter are treated. Chances are your supplier found a cheap secondary source in Thailand. Only one source in Montana requires almost all the stones to be treated. Rock Creek. The rest have a treatment rate of around 17%