By courtesy of the United States 

 Geological Survey 

 OPEN CUT IN HIMALAYA MINE, CALIFORNIA 



The pegmatite veins are coarsely developed granites wherein the three constituents of that rock, 

 mica, feldspar, and quartz, are strongly individualized. Pegmatite forms the matrix of the tourmalines 

 which, developed in it in highly colored crystals, form wonderful mineral aggregates with the limpid 

 quartz and opaline feldspars, wherein, more rarely, the lilac kunzite is discovered 



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