Surf these sites: Coober Pedy Opal -- Opal sales for the lapiarist and the rock hound direct from Coober Pedy South Australia. Gallagher Minerals -- Specializeing in rough and cabochons in the copper-based minerals of Arizona, such as chrysocolla, gem silica chrysocolla, azurite, malachite, turquoise and cuprite. Also Michigan copper and Arkansas quartz.
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