Tourmaline on feldspar, San Diego Co, CA, USA
description: 4" tall Ex Irv Brown and William Severance collections. I acquired this piece from Robert Lavinsky in September 2009. Irv Brown is well known collector and a long time San Diego resident. William Severance is a famous collector who lives in Pennsylvania. This piece is from the Himalaya Mine near Mesa Grande in San Diego county, California. It is special for the following reason: (a) Orthoclase is a less common matrix for elbaite than what quartz is. This is since feldspars are normally not chemically stable within gem pockets. Feldspars react with water to form clay minerals. (b) The orthoclase crystal is also a Baveno twin.
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