Organic Gemstone (Not A Mineral)

Browse organic gemstone (not a mineral) specimens identified by the Rock Identifier community.

Garnet

Garnet Group (Silicate mineral); general formula X3Y2(SiO4)3

mineral

Quartz (Crystal Cluster)

Silicon Dioxide (SiO2)

mineral

Quartz (Milky or Clear variety)

Silicon Dioxide (SiO2)

mineral

Blue Sapphire

Corundum (Al2O3)

mineral

Milky Quartz

Crystalline Silicon Dioxide (SiO2)

mineral

Sodalite

Sodium Aluminum Silicate Chloride (Na8(Al6Si6O24)Cl2)

mineral

Sodalite

Sodalite [Na8(Al6Si6O24)Cl2]

mineral

Quartz (specifically Citrine or Iron-stained Quartz)

Silicon Dioxide (SiO2)

mineral

Blue Dumortierite Quartz

AlAl6BSi3O18 (Dumortierite) within SiO2 (Quartz)

mineral

Chalcedony

Silicon Dioxide (SiO₂)

mineral

Blue Sapphire

Corundum (Al2O3 with trace Titanium/Iron)

mineral

Milky Quartz

Silicon Dioxide (SiO2)

Mineral

Milky Quartz

Silicon Dioxide (SiO2)

mineral

Turquoise

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

mineral

Amazonite

Amazonite (KAlSi3O8)

mineral

Red Jasper

Jasper (Silicon Dioxide with Iron Oxide inclusions - SiO2)

mineral

Quartz (Milky or Rough Quartz)

Silicon Dioxide (SiO2)

mineral

Bronzite

Enstatite (var. Bronzite), (Mg,Fe)SiO3

mineral

Red Coral

Corallium rubrum (for precious red coral), although other species like Corallium japonicum and Paracorallium are also used.

Organic Gemstone (not a rock or mineral in the traditional sense, but bio-mineralized material)

Blue Topaz (facetted in jewelry)

Aluminum silicate fluoride hydroxide (Al2SiO4(F,OH)2)

mineral

Turquoise

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

mineral

Fancy Jasper (Bloodstone variety)

Silicon Dioxide (SiO2) with iron oxide inclusions

sedimentary

Ruby

Corundum (Al2O3 with Chromium impurities)

mineral

White Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

mineral

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

mineral

Petrified Wood

Silicified wood (Quartz/Chalcedony)

Sedimentary

Quartz Vein in Host Rock

Silicon Dioxide (SiO2)

mineral / metamorphic

Clear Quartz

Silicon Dioxide (SiO2)

mineral

Quartz

Silicon Dioxide (SiO2)

mineral

Red Jasper

Silicon dioxide (SiO2) with hematite impurities

sedimentary

Jasper Shard / Chert

Silicon dioxide (SiO2)

sedimentary

Rough Emerald (Beryl)

Emerald (Be3Al2(SiO3)6 with Cr/V impurities)

mineral

Goldstone (Red)

Aventurine Glass (Cupriferous glass)

Synthetic Glass (Man-made)

Milky Quartz Pebble

Silicon Dioxide (SiO2)

mineral

Hypersthene

Hypersthene ((Mg,Fe)SiO₃)

Mineral

Milky Quartz

Silicon Dioxide (SiO2)

mineral

Quartz (Milky/Smoky variety)

Silicon Dioxide (SiO2)

mineral

Red Jasper

Silicon dioxide with hematite impurities (SiO2 + Fe2O3)

mineral

Sodalite

Sodalite - Na8(Al6Si6O24)Cl2

mineral

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

mineral

Rose Quartz

Silicon Dioxide (SiO2) with traces of titanium, iron, or manganese

mineral

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

mineral