cobalt123:
Blue Topaz and Diamond Necklace
cobalt123:
The Mineralogical Record Booth
cobalt123:
Shattuckite Detail
cobalt123:
Azurite from Bisbee, Arizona
cobalt123:
Quartz Crystal, Iron Oxide Staining
cobalt123:
Native Copper, Ed Davis Collection
cobalt123:
Plumbgogummite under Pyromorphite
cobalt123:
Plumbogummite Specimen
cobalt123:
Red Earth Opal, after Ikiate and Glendonite