Mineral (Organic Gemstone)

Beryl (Aquamarine) in Matrix

Beryllium aluminum silicate (Be3Al2(SiO3)6)

Granatic Pegmatite

Pegmatitic Granite

Unakite (Tumbled)

Epidotized Granite

Orthoclase Feldspar

Orthoclase (KAlSi3O8)

Jasper

Silicon Dioxide (SiO2) with iron and magnesium inclusions

Unakite

Epidotized Granite

Unakite

Epidotized Granite

Orthoclase (Potassium) Feldspar in Quartz

KAlSi3O8 (Potassium Aluminum Silicate)

Azurite and Malachite

Azurite (Cu3(CO3)2(OH)2) and Malachite (Cu2(CO3)(OH)2)

Rhodonite

Rhodonite (Mn2+SiO3)

Red Garnet

Garnet Group (e.g., Pyrope, Almandine, Spessartine, Grossular, Andradite, Uvarovite)

Jasper with Iron Staining

Silicon Dioxide (SiO2) with impurities

Peach Moonstone

Orthoclase Feldspar (KAlSi3O8) with inclusions

Granite (with Beryl/Aquamarine)

Granite (Feldspar, Quartz, Mica, and Beryl Be3Al2Si6O18)

Celestite (Celestine)

Strontium sulfate (SrSO4)

Black Sapphire

Corundum (Al2O3)

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxide inclusions)

Turquoise

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

Prehnite

Prehnite (Ca2Al(AlSi3O10)(OH)2)

Turquoise

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

Tiger's Eye

SiO2 (Silicon Dioxide with inclusions of Goethite/Limonite)

Milky Quartz

Silicon Dioxide (SiO2)

Sodalite

Sodalite Na8(Al6Si6O24)Cl2

Yellow Quartz Pebble (Citrine or Iron-Stained Quartz)

Silicon Dioxide (SiO2)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Amethyst (as seen in jewelry)

Amethyst (Silicon Dioxide SiO2 + Fe4+)

Fuchsite

Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)

Peridot

Olivine (Magnesium Iron Silicate), (Mg, Fe)2SiO4

Sodalite

Sodalite (Na8Al6Si6O24Cl2)

Citrine Quartz

Silicon Dioxide (SiO2)

Turquoise

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

Labradorite

Labradorite (Plagioclase Feldspar series; (Ca,Na)(Al,Si)4O8)

Amethyst

SiO2 (Silicon Dioxide with Iron impurities and irradiation)

Clear Quartz

Crystalline Silicon Dioxide (SiO2)

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxide inclusions)

Sunstone with Moonstone (Peach Moonstone)

Orthoclase Feldspar (KAlSi3O8)

Almandine Garnet

Iron aluminum silicate (Fe3Al2(SiO4)3)

Blue Lace Agate (Tumbled)

Silicon Dioxide (SiO2)

Rhodonite

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

Orthoclase Feldspar (Salmon variety)

Orthoclase, KAlSi3O8

Turquoise

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