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|The Great Andesine Scam by Gary Kratochvil copyright 2008|
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|