Rock Identifier

Category

Organic Gemstone

Browse organic gemstone specimens identified by the Rock Identifier community.

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

Amazonite (Microcline (KAlSi3O8) with trace lead (Pb) impurities) — mineral

Amazonite

Microcline (KAlSi3O8) with trace lead (Pb) impurities

Sodalite (Sodalite (Na8Al6Si6O24Cl2)) — mineral

Sodalite

Sodalite (Na8Al6Si6O24Cl2)

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

Amethyst (Cabochon) (Silicon Dioxide (SiO2) with iron impurities) — mineral

Amethyst (Cabochon)

Silicon Dioxide (SiO2) with iron impurities

Quartz (Milky Quartz) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Quartz (Smoky Quartz variant) (Silicon Dioxide (SiO2)) — mineral

Quartz (Smoky Quartz variant)

Silicon Dioxide (SiO2)

Carnelian Agate (Silicon Dioxide (SiO2) with iron oxide impurities) — mineral

Carnelian Agate

Silicon Dioxide (SiO2) with iron oxide impurities

Rainbow Moonstone with Black Tourmaline (White Labradorite (Feldspar variety, (Na,Ca)(Al,Si)4O8) with Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)) — mineral

Rainbow Moonstone with Black Tourmaline

White Labradorite (Feldspar variety, (Na,Ca)(Al,Si)4O8) with Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)

Ethiopian Fire Opal (Hydrated Silica (SiO2·nH2O)) — mineral

Ethiopian Fire Opal

Hydrated Silica (SiO2·nH2O)

Citrine (Silicon dioxide (SiO2)) — mineral

Citrine

Silicon dioxide (SiO2)

Chlorastrolite (Isle Royale Greenstone) (Chlorastrolite (Pumpellyite-(Mg,Al)), formula: Ca2(Mg,Fe)Al2(SiO4)(Si2O7)(OH)2∙H2O) — mineral

Chlorastrolite (Isle Royale Greenstone)

Chlorastrolite (Pumpellyite-(Mg,Al)), formula: Ca2(Mg,Fe)Al2(SiO4)(Si2O7)(OH)2∙H2O

Amazonite (Amazonite (K(AlSi3O8))) — mineral

Amazonite

Amazonite (K(AlSi3O8))

Citrine (Silicon Dioxide (SiO2) with iron impurities) — mineral

Citrine

Silicon Dioxide (SiO2) with iron impurities

Sodalite (Sodalite (Na8(Al6Si6O24)Cl2)) — mineral

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Amazonite (Potassium Feldspar (KAlSi3O8)) — mineral

Amazonite

Potassium Feldspar (KAlSi3O8)

Tiger's Eye (specifically Blue Tiger's Eye / Falcon's Eye) (Pseudomorph of Quartz after Crocidolite (SiO2)) — metamorphic

Tiger's Eye (specifically Blue Tiger's Eye / Falcon's Eye)

Pseudomorph of Quartz after Crocidolite (SiO2)

Clear Quartz (Carved Dragon) (Quartz (Silicon Dioxide, SiO2)) — mineral

Clear Quartz (Carved Dragon)

Quartz (Silicon Dioxide, SiO2)

White Quartz (Silicon Dioxide (SiO2)) — mineral

White Quartz

Silicon Dioxide (SiO2)

Green Quartzite (Metamorphic rock primarily composed of Silicon Dioxide (SiO2) with mineral inclusions like fuchsite or chlorite) — metamorphic

Green Quartzite

Metamorphic rock primarily composed of Silicon Dioxide (SiO2) with mineral inclusions like fuchsite or chlorite

Turquoise (Turquoise (CuAl6(PO4)4(OH)8·4H2O)) — mineral

Turquoise

Turquoise (CuAl6(PO4)4(OH)8·4H2O)

Chert (Chalcedony/Agate variety) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Chalcedony/Agate variety)

Silicon Dioxide (SiO2)

Shale or Mudstone (Based on appearance) (Shale (fine-grained, laminated fissile sedimentary rock) / Mudstone (fine-grained, non-fissile sedimentary rock)) — Sedimentary

Shale or Mudstone (Based on appearance)

Shale (fine-grained, laminated fissile sedimentary rock) / Mudstone (fine-grained, non-fissile sedimentary rock)

Jasper (Silicon dioxide (SiO2)) — sedimentary

Jasper

Silicon dioxide (SiO2)

Amethyst (Amethyst (Purple Quartz); formula: SiO2 (Silicon Dioxide)) — mineral

Amethyst

Amethyst (Purple Quartz); formula: SiO2 (Silicon Dioxide)

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

Turquoise

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

Sunstone (Oligoclase (a plagioclase feldspar variant), (Na,Ca)(Al,Si)4O8) — mineral

Sunstone

Oligoclase (a plagioclase feldspar variant), (Na,Ca)(Al,Si)4O8

Red Jasper (Jasper (Silicon Dioxide with Iron Oxide impurities), SiO2) — sedimentary

Red Jasper

Jasper (Silicon Dioxide with Iron Oxide impurities), SiO2

Unakite (Epidotized Granite) — metamorphic

Unakite

Epidotized Granite

Aquamarine (Beryl (Be3Al2Si6O18 with trace Fe2+)) — Mineral

Aquamarine

Beryl (Be3Al2Si6O18 with trace Fe2+)

Red Jasper with Quartz Veining (Silicon Dioxide (SiO2) - Microcrystalline Quartz with Iron Oxide impurities (Hematite)) — sedimentary

Red Jasper with Quartz Veining

Silicon Dioxide (SiO2) - Microcrystalline Quartz with Iron Oxide impurities (Hematite)

Unakite (Epidotized Granite) (Epidotized Granite) — metamorphic

Unakite (Epidotized Granite)

Epidotized Granite

Red Jasper (Silicon Dioxide (SiO2) with iron oxide inclusions) — sedimentary

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Moonstone (Variety of Orthoclase Feldspar) (KAlSi3O8 (Potassium Aluminum Silicate)) — mineral

Moonstone (Variety of Orthoclase Feldspar)

KAlSi3O8 (Potassium Aluminum Silicate)

White Topaz (Aluminum silicate fluoride hydroxide (Al2SiO4(F,OH)2)) — mineral

White Topaz

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

Opal (Hydrated amorphous form of silica (SiO2·nH2O)) — mineral

Opal

Hydrated amorphous form of silica (SiO2·nH2O)

Fuchsite (Green Muscovite in Quartz) (Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)) — metamorphic

Fuchsite (Green Muscovite in Quartz)

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

Rhodonite (Rhodonite (Manganese silicate, (Mn,Fe,Mg,Ca)SiO3)) — mineral

Rhodonite

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

Howlite (White Buffalo Turquoise) (Howlite (Calcium Borosilicate Hydroxide), Ca2B5SiO9(OH)5) — mineral

Howlite (White Buffalo Turquoise)

Howlite (Calcium Borosilicate Hydroxide), Ca2B5SiO9(OH)5

Rhodochrosite (Manganese Carbonate (MnCO3)) — mineral

Rhodochrosite

Manganese Carbonate (MnCO3)

Sunstone (Oligoclase or Andesine (Labradorite) Feldspar (Na,Ca)(Si,Al)4O8) — mineral

Sunstone

Oligoclase or Andesine (Labradorite) Feldspar (Na,Ca)(Si,Al)4O8

Carnelian (a variety of Chalcedony) (Silicon dioxide (SiO2) with iron oxide impurities) — mineral

Carnelian (a variety of Chalcedony)

Silicon dioxide (SiO2) with iron oxide impurities