Mineral (Gemstone Variety Of Beryl)

Pearl

Calcium carbonate (CaCO3) in the form of Aragonite or Calcite

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Sandstone (Quartzose Sandstone Pebble)

Arenite (primarily SiO2)

Serpentinite

Serpentinite (complex silicate minerals including Lizardite, Antigorite, and Chrysotile)

Rhodonite

Manganese Silicate (Mn,Fe,Mg,Ca)SiO3

Rhodonite

Rhodonite (Manganese Silicate), (Mn,Fe,Mg,Ca)SiO3

Rhodonite

Rhodonite (Manganese Iron Magnesium Calcium Silicate) - (Mn+2,Fe+2,Mg,Ca)SiO3

Conglomerate

Conglomerate (Detrital sedimentary rock)

Porphyritic Andesite

Andesite (porphyritic variety)

Leopard Skin Jasper

Chalcedony (cryptocrystalline quartz) with inclusions

Jasper (Multi-color Chert)

Silicon dioxide (SiO2)

Chert (Nodule)

Silicon Dioxide (SiO2)

Chert (Jasper/Flint variety)

Microcrystalline quartz (SiO2)

Green Chalcedony

Silicon Dioxide (SiO2) with trace minerals

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

Epidote (likely Pistacite in Epidosite rock)

Epidote: Ca2(Al,Fe)3(SiO4)3(OH)

Serpentinite

Serpentinite (complex silicate minerals including lizardite, chrysotile, and antigorite: (Mg,Fe)3Si2O5(OH)4)

Quartzite with inclusions

Metamorphosed Quartz-rich Rock (SiO2)

Banded Jasper (Chert)

Silicon Dioxide (SiO2) - variety of Chalcedony

Precious Opal

Hydrated Silica (SiO2·nH2O)

Jasper (specifically Polychrome or Desert Jasper)

Silicon Dioxide with impurities (SiO2)

Indigo Gabbro

Gabbro (composed of plagioclase feldspar, pyroxene, and olivine)

Obsidian

Obsidian (Volcanic Glass, SiO2 + impurities)

Pearl

Calcium Carbonate (Aragonite and Calcite), CaCO3

Red Jasper (River pebble)

Jasper (Silicon Dioxide, SiO2 plus iron oxide impurities)

Rough Diamond

Diamond (pure Carbon, C)

Rhodonite (in matrix)

Rhodonite (Mn,Fe,Mg,Ca)SiO3

Garnet (Almandine)

Almandine (Fe3Al2(SiO4)3)

Amethyst (Tumbled/Polished)

Silicon Dioxide (SiO2) with iron impurities

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Tiger's Eye

Tiger's Eye (Pseudomorph of Quartz after Crocidolite), SiO2

Smoky Quartz

Smoky Quartz (Silicon Dioxide, SiO2)

Carnelian (Red Chalcedony)

Silicon Dioxide (SiO2)

Carnelian Agate (with Quartz/Chalcedony)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Ruby (Pink to Red Corundum)

Al2O3 (Corundum with Chromium impurities)

Selenite (Gypsum)

Hydrous calcium sulfate (CaSO4·2H2O)

Jasper Agate

Chalcedony (Silicon Dioxide - SiO2)

Smoky Quartz

Smoky Quartz (Silicon Dioxide, SiO2)

Turquoise

Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]

Rough Gemstone Grains (Mixed Sapphires and Quartz)

Corundum (Al2O3) and Quartz (SiO2)

Chrysocolla in Matrix

Chrysocolla (Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O)

Smoky Quartz on Feldspar (Granite Pegmatite)

Silicon Dioxide (SiO2) with Potassium Aluminum Silicate (KAlSi3O8)