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Articles |
| 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 |
| Common Sense Gemstone Grading by Jeff R. Graham copyright 2007 |