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Exploring the Himalaya Tourmaline Mine. A video by Gary Kratochvil and Chris Rose.
See an actual tourmaline pocket as it is uncovered for the very first time. This particular pocket had fallen to the floor out of the pegmatite during past large scale mining operations and was completely missed by the miners. Their loss is our gain!
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| The Great Andesine Scam by Gary Kratochvil copyright 2008 |
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Fabulous Feldspars Colored Stone Magazine Nov - Dec Issue
This entire issue is devoted to feldspars including Oregon Sunstone. One of the featured stones is a 12.10 carat red with schiller cut by Gary Kratochvil. This is a PDF reprint of the article used by permission of Colored Stone Magazine. |
| Drilling For Oregon Sunstone by Gary Kratochvil copyright 2008 |
| GIA Colored Stone Grading System by Jeff R. Graham copyright 2007 |
| Additional comments on the GIA Colored Stone Grading System by Gary Kratochvil |
| Common Sense Gemstone Grading by Jeff R. Graham copyright 2007 |
| Grading Oregon Sunstone by Jeff R. Graham copyright 2007 |
| My Experience With TZ-Gems by Gary Kratochvil |
| Sapphire Faceting Machine made by Arrow Profile Company |
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