Rock Identifier

Category

Gemstone

Browse gemstone specimens identified by the Rock Identifier community.

Learn about Gemstone in the encyclopedia

Achroite

Alexandrite

Almandine Garnet

Almandine Garnet

Amber

Andamooka Opal

Andesine

Andesine-Labradorite

Andesine-Labradorite

Andradite Garnet

Andradite Garnet

Ant Hill Garnet

Ant Hill Garnet

Aquamarine

Australian Opal

Australian Opal

Aventurine Feldspar

Aventurine Feldspar

Tiger's Eye (SiO2 with crocidolite inclusion) — mineral

Tiger's Eye

SiO2 with crocidolite inclusion

Opal (Hydrated amorphous silica (SiO2·nH2O)) — mineraloid

Opal

Hydrated amorphous silica (SiO2·nH2O)

Quartz Crystal (Silicon Dioxide (SiO2)) — mineral

Quartz Crystal

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Almandine Garnet (Iron Aluminum Silicate (Fe3Al2(SiO4)3)) — mineral

Almandine Garnet

Iron Aluminum Silicate (Fe3Al2(SiO4)3)

Jasper (Microcrystalline quartz (SiO2)) — sedimentary

Jasper

Microcrystalline quartz (SiO2)

Green Quartz (Silicon Dioxide (SiO2)) — mineral

Green Quartz

Silicon Dioxide (SiO2)

Green Aventurine (Quartz (SiO2) with fuchsite inclusions) — mineral

Green Aventurine

Quartz (SiO2) with fuchsite inclusions

Chalcedony (Silicon Dioxide (SiO2)) — mineral

Chalcedony

Silicon Dioxide (SiO2)

Ruby in Zoisite (Anyolite) — metamorphic

Ruby in Zoisite

Anyolite

Quartz Geode Fragment (Silicon Dioxide (SiO2)) — mineral

Quartz Geode Fragment

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Sodalite (Na8Al6Si6O24Cl2) — mineral

Sodalite

Na8Al6Si6O24Cl2

Citrine (Silicon Dioxide (SiO2)) — mineral

Citrine

Silicon Dioxide (SiO2)

Sugilite (KNa2(Fe,Mn,Al)2Si12O30) — mineral

Sugilite

KNa2(Fe,Mn,Al)2Si12O30

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Spessartine Garnet (Mn3Al2(SiO4)3) — mineral

Spessartine Garnet

Mn3Al2(SiO4)3

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Fossil shell fragment, likely bivalve or gastropod (Fossilized calcium-carbonate shell; likely aragonite/calcite replaced by calcite) — fossil

Fossil shell fragment, likely bivalve or gastropod

Fossilized calcium-carbonate shell; likely aragonite/calcite replaced by calcite

Possible garnet crystal (Likely almandine garnet, Fe₃Al₂(SiO₄)₃; identification is uncertain from this small image) — mineral

Possible garnet crystal

Likely almandine garnet, Fe₃Al₂(SiO₄)₃; identification is uncertain from this small image

Quartz (Golden Quartz / Citrine / Iron-stained Quartz) (Silicon Dioxide (SiO2)) — mineral

Quartz (Golden Quartz / Citrine / Iron-stained Quartz)

Silicon Dioxide (SiO2)

Amazonite (Microcline (KAlSi3O8)) — mineral

Amazonite

Microcline (KAlSi3O8)

Dyed Agate (Microcrystalline Quartz (SiO2) with artificial pigment) — sedimentary

Dyed Agate

Microcrystalline Quartz (SiO2) with artificial pigment

Yellow Quartz (Citrine Quartz) (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz (Citrine Quartz)

Silicon Dioxide (SiO2)

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

Amazonite

Microcline (KAlSi3O8) with lead impurities

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

Turquoise (Rough)

CuAl6(PO4)4(OH)8·4H2O

Jasper (SiO2 (Silicon Dioxide)) — mineral

Jasper

SiO2 (Silicon Dioxide)

Prehnite (Ca2Al2Si3O10(OH)2) — mineral

Prehnite

Ca2Al2Si3O10(OH)2

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

Amazonite

Microcline (K(AlSi3O8))

Citrine Quartz (Silicon Dioxide (SiO2)) — mineral

Citrine Quartz

Silicon Dioxide (SiO2)

Emerald in Matrix (Beryl (Be3Al2Si6O18)) — mineral

Emerald in Matrix

Beryl (Be3Al2Si6O18)

Citrine (Silicon Dioxide (SiO2)) — mineral

Citrine

Silicon Dioxide (SiO2)

Amethyst Geode (Silicon Dioxide (SiO2) - Amethyst variety of Quartz) — mineral

Amethyst Geode

Silicon Dioxide (SiO2) - Amethyst variety of Quartz

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Heated Citrine (Heat-Treated Amethyst) (Silicon Dioxide (SiO2), quartz variety) — mineral

Heated Citrine (Heat-Treated Amethyst)

Silicon Dioxide (SiO2), quartz variety

White Quartz (Silicon Dioxide (SiO2)) — mineral

White Quartz

Silicon Dioxide (SiO2)

Quartz Crystal in Matrix (Silicon Dioxide (SiO2)) — mineral

Quartz Crystal in Matrix

Silicon Dioxide (SiO2)