Rock Identifier

Category

Mineral (Specifically A Mineraloid)

Browse mineral (specifically a mineraloid) specimens identified by the Rock Identifier community.

Learn about Mineral (Specifically A Mineraloid) in the encyclopedia

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Shungite

Shungite

Anatase

Anatase

Sperrylite

Sperrylite

Olenite

Olenite

Buergerite

Buergerite

Hutcheonite

Celsian

Celsian

Coal

Coal

Glauconite

Glauconite

Rock Salt

Rock Salt

Baddeleyite

Baddeleyite

Talc

Talc

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

Chrysocolla

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

mineral
Gypsum (variety Selenite or Alabaster) (Calcium sulfate dihydrate (CaSO4·2H2O)) — Mineral

Gypsum (variety Selenite or Alabaster)

Calcium sulfate dihydrate (CaSO4·2H2O)

Mineral
Bloodstone (Chalcedony (cryptocrystalline quartz)) — Mineral/Semiprecious Stone

Bloodstone

Chalcedony (cryptocrystalline quartz)

Mineral/Semiprecious Stone
Limonite and Goethite on Gossan (FeO(OH)·nH2O) — mineral

Limonite and Goethite on Gossan

FeO(OH)·nH2O

mineral
Fluorite (tumbled pebble) (Calcium Fluoride (CaF2)) — mineral

Fluorite (tumbled pebble)

Calcium Fluoride (CaF2)

mineral
Peacock Ore (Bornite (Cu5FeS4) or Chalcopyrite (CuFeS2) with iridescent tarnish) — mineral

Peacock Ore

Bornite (Cu5FeS4) or Chalcopyrite (CuFeS2) with iridescent tarnish

mineral
Lepidolite (Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)) — mineral

Lepidolite

Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)

mineral
Chrysocolla (Chrysocolla; (Cu,Al)2H2Si2O5(OH)4·nH2O) — mineral

Chrysocolla

Chrysocolla; (Cu,Al)2H2Si2O5(OH)4·nH2O

mineral
Pyrite (Fool's Gold) (Iron Disulfide (FeS2)) — mineral

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

mineral
Satin Spar (often sold as Selenite) (Gypsum (CaSO4·2H2O)) — mineral

Satin Spar (often sold as Selenite)

Gypsum (CaSO4·2H2O)

mineral
Amethyst (Silicon Dioxide (Quartz variety)) — gemstone

Amethyst

Silicon Dioxide (Quartz variety)

gemstone
Amethyst (Quartz (SiO2)) — mineral

Amethyst

Quartz (SiO2)

mineral
Amethyst (Quartz (SiO2)) — gemstone

Amethyst

Quartz (SiO2)

gemstone
Amethyst (Quartz (Silicon Dioxide with Iron impurities), SiO2) — mineral

Amethyst

Quartz (Silicon Dioxide with Iron impurities), SiO2

mineral
Malachite (Copper carbonate hydroxide [Cu2CO3(OH)2]) — mineral

Malachite

Copper carbonate hydroxide [Cu2CO3(OH)2]

mineral
Quartz pebble (Silicon dioxide (SiO2)) — sedimentary

Quartz pebble

Silicon dioxide (SiO2)

sedimentary
Quartz pebble (Silicon dioxide (SiO2)) — sedimentary

Quartz pebble

Silicon dioxide (SiO2)

sedimentary
Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

mineral
Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

mineral
Quartz crystal (Quartz (Silicon dioxide, SiO2)) — mineral

Quartz crystal

Quartz (Silicon dioxide, SiO2)

mineral
Galena (Lead Sulfide (PbS)) — mineral

Galena

Lead Sulfide (PbS)

mineral
Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

mineral
Quartz Vein Rock (Silicon dioxide (SiO2) within a host rock matrix) — mineral

Quartz Vein Rock

Silicon dioxide (SiO2) within a host rock matrix

mineral
Emerald (Beryl (Be3Al2(SiO3)6)) — gemstone

Emerald

Beryl (Be3Al2(SiO3)6)

gemstone
Desert Rose (Gypsum/Baryte) (Hydrated Calcium Sulfate (CaSO4·2H2O)) — mineral

Desert Rose (Gypsum/Baryte)

Hydrated Calcium Sulfate (CaSO4·2H2O)

mineral
Prehnite (Prehnite (Ca2Al2Si3O10(OH)2)) — mineral

Prehnite

Prehnite (Ca2Al2Si3O10(OH)2)

mineral
Aquamarine (Beryl (Be3Al2(SiO3)6)) — gemstone

Aquamarine

Beryl (Be3Al2(SiO3)6)

gemstone
Aquamarine (Be3Al2(Si6O18)) — gemstone

Aquamarine

Be3Al2(Si6O18)

gemstone
Agate Geode (Silicon Dioxide (SiO2) - Chalcedony variety) — sedimentary

Agate Geode

Silicon Dioxide (SiO2) - Chalcedony variety

sedimentary
Quartz Vein in Host Rock (Silicon dioxide (SiO2) veining in silicate matrix) — sedimentary

Quartz Vein in Host Rock

Silicon dioxide (SiO2) veining in silicate matrix

sedimentary
Jasper (Silicon dioxide (Quartz variety), SiO2) — sedimentary

Jasper

Silicon dioxide (Quartz variety), SiO2

sedimentary
Malachite / Copper Ore (Cu2CO3(OH)2) — mineral

Malachite / Copper Ore

Cu2CO3(OH)2

mineral
Copper Ore (Malachite and Azurite on Host Rock) (Cuprite, Malachite, and Azurite dissemination in gangue) — mineral

Copper Ore (Malachite and Azurite on Host Rock)

Cuprite, Malachite, and Azurite dissemination in gangue

mineral
Jasper and Agate Mix (Silicon dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Jasper and Agate Mix

Silicon dioxide (SiO2) - Microcrystalline Quartz

sedimentary
Goethite (Goethite (FeO(OH))) — mineral

Goethite

Goethite (FeO(OH))

mineral
Agate Nodule / Chalcedony (Silicon Dioxide (SiO2)) — sedimentary

Agate Nodule / Chalcedony

Silicon Dioxide (SiO2)

sedimentary
Chevron Amethyst (Silicon Dioxide with Iron Impurities (SiO2)) — mineral

Chevron Amethyst

Silicon Dioxide with Iron Impurities (SiO2)

mineral
Sodalite (Na4Al3(SiO4)3Cl (Sodium Aluminum Silicate Chloride)) — mineral

Sodalite

Na4Al3(SiO4)3Cl (Sodium Aluminum Silicate Chloride)

mineral
Blue Calcite (Calcite (Calcium Carbonate, CaCO3)) — mineral

Blue Calcite

Calcite (Calcium Carbonate, CaCO3)

mineral
Quartz pebble (Silicon dioxide (SiO2)) — sedimentary

Quartz pebble

Silicon dioxide (SiO2)

sedimentary
Quartz with Iron Staining (Silicon Dioxide (SiO2)) — mineral

Quartz with Iron Staining

Silicon Dioxide (SiO2)

mineral
Tiger's Eye (Quartz pseudomorph after crocidolite (SiO2)) — gemstone

Tiger's Eye

Quartz pseudomorph after crocidolite (SiO2)

gemstone