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
Biotite Mica and Apatite Crystals, 121 Grams
Kosta Boda Crystal
Andesite: Mineral information, data and localities.
Random Grain Orientation
Rock Your Chakra Apache Tear 3/4 Tumbled Root Chakra
Trachyte Igneous Rock - Mini Me Geology
Rock Your Chakra Carborundum 4 8-12 Oz Rough All
Biotite
Andesite
Biotite mica: The mineral Biotite information and pictures
ALEX STREKEISEN-Diorite
Solved What is Mineralogy? Mineralogy is the study of
Biotite Rough