National Shutdowns have put the lid on most shows.
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 Post subject: San Francisco Gem & Mineral Society Scores
PostPosted: Mon Aug 06, 2012 1:52 pm 
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Location: San Francisco
Adamite (cuprian) with Conichalchite and Calcite. Adamite is a zinc arsenate hydroxide mineral, Zn2AsO4OH.
Ojuela Mine
Mapimi
Durango
Mexico

The copper content makes this specimen unusually attractive for adamite, BUT it makes the adamite inert to UV fluorescence.
Image

Large Specimen:
Crocoite lead chromate, PbCrO4, and crystallizing in the monoclinic crystal system. It is sometimes used as a paint, being identical in composition with the artificial product chrome yellow.
Adelaide Mine
Dundas
Tasmania, Australia

Image
Bottom mini specimen was one I collected in Russia at Crocoite's Type Locality:Berezovsky deposit near Ekaterinburg in the Urals. Discovered in 1766....mine was collected in 2011 :wink:


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