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Gold in Quartz - Libby Mining District, Lincoln Co., Montana, USA More info: https://www.irocks.com/minerals/specimen/50919 A special locality specimen consisting of rich and bright gold infiltrating a quartz matrix, from a highly unusual locality. Found in 1991 and brought to market by Cal Graeber, from whom this was purchased, this was a significant find. Overall just over 5 ounces in weight, (just under 150 grams) this contains 3.49 ounces (108.65 grams) of gold by specific gravity analysis.
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