Closeup of the polished face of the Bauxite specimen Berthierite on quartz and calcite from Romania Aquamarine "Trapiche" emerald crystal from Colombia Cavansite balls on white stilbite from India 2,200 pound glacial nugget of copper from Michigan Copper Halite crystals from Austria Hematite replacing magnetite crystals from Patagonia, Argentina Float copper nugget with silver from Michigan Twinned arborescent grouping of native silver crystals from Chile Quartz crystals from Pennsylvania Rutile crystal from Georgia Stibnite crystals from Romania Acicular crystals of strontianite from Illinois
Calcite ball on quartz crystals from Romania Stalactitic calcite from China Calcite Variety Stalactitic Stacked fluorapatite crystals from Pennsylvania Crystalline gold from California hemimorphite after calcite Laumontite crystals from California Magnetite Wire silver crystals from Kazakhstan Natrolite crystal spray in air bubble in basalt from India Slender crystals of pentagonite from India Platinum Scheelite crystal from South Korea Uraninite crystal from Maine