Biotite Mica in Andesite

This unique stone is flakes of biotite mica embedded in andesite and was mined by a friend of mine from Union Valley Reservoir, El Dorado County, California. The biotite mica sparkles as you turn the stone in the light. The golden mica and light gray andesite make beautiful contrasting colored specimens.NOTE: Tiny flakes will come off in shipment no matter how well it is packaged. That is just the nature of biotite and andesite.You will receive one specimen from the lot shown in the photos that is 2 1/2 inch to 3 inch and weighs 4 to 7 ounces.Bulk Purchase ListingYou are buying one rock from the lot shown in the photographs. Listing every rock separately adds a lot in labor costs. We pass that savings on to you with lower prices and higher quality than the competition. 75% of

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