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

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Blue Sapphire (Raw/Tumbled Corundum) (Corundum (Aluminum Oxide, Al2O3 with Fe/Ti traces)) — mineral

Blue Sapphire (Raw/Tumbled Corundum)

Corundum (Aluminum Oxide, Al2O3 with Fe/Ti traces)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

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

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Garnet Schist (Almandine-Garnet Schist) — metamorphic

Garnet Schist

Almandine-Garnet Schist

Unakite (Epidotized Granite) (Epidotized Granite (SiO2 with Ca2(Al,Fe)3(SiO4)3(OH))) — metamorphic

Unakite (Epidotized Granite)

Epidotized Granite (SiO2 with Ca2(Al,Fe)3(SiO4)3(OH))

Green Aventurine (Aventurine Quartz (SiO2 with Fuchsite inclusions)) — metamorphic

Green Aventurine

Aventurine Quartz (SiO2 with Fuchsite inclusions)

Tiger's Eye (Titanium-containing Quartz (Silica: SiO2)) — Mineral

Tiger's Eye

Titanium-containing Quartz (Silica: SiO2)

Quartz / Quartz Cluster (Silicon Dioxide (SiO2)) — mineral

Quartz / Quartz Cluster

Silicon Dioxide (SiO2)

Moonstone (Adularia (orthoclase) or Albite (plagioclase), a potassium aluminum silicate of the feldspar group) — Mineral

Moonstone

Adularia (orthoclase) or Albite (plagioclase), a potassium aluminum silicate of the feldspar group

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

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Quartz (Rock Crystal) (Silicon Dioxide (SiO2)) — mineral

Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Chalcedony Agate / Carnelian nodules in Matrix (SiO2 (Silicon Dioxide) with iron oxide inclusions) — mineral

Chalcedony Agate / Carnelian nodules in Matrix

SiO2 (Silicon Dioxide) with iron oxide inclusions

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Faceted Diamond or Cubic Zirconia (Carbon (C) for Diamond; Zirconium dioxide (ZrO2) for CZ) — mineral

Faceted Diamond or Cubic Zirconia

Carbon (C) for Diamond; Zirconium dioxide (ZrO2) for CZ

Quartz (Microcrystalline variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Microcrystalline variety)

Silicon Dioxide (SiO2)

Fire Opal in Host Rock (Amorphous Hydrous Silica (SiO2·nH2O)) — mineral

Fire Opal in Host Rock

Amorphous Hydrous Silica (SiO2·nH2O)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Ring with an Orange Inlay (N/A (Man-made object)) — Man-made Object (Ring)

Ring with an Orange Inlay

N/A (Man-made object)

Man-made Object (Ring)

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

Turquoise

CuAl6(PO4)4(OH)8·4H2O

Amazonite (Amazonite / Microcline (KAlSi3O8)) — igneous

Amazonite

Amazonite / Microcline (KAlSi3O8)

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]

Carnelian Agate (Silicon Dioxide (SiO2) - Carnelian variety of Chalcedony) — Mineral

Carnelian Agate

Silicon Dioxide (SiO2) - Carnelian variety of Chalcedony

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)

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

Rhodonite

Manganese Silicate (Mn,Fe,Mg,Ca)SiO3

Citrine (Silicon dioxide (SiO2)) — mineral

Citrine

Silicon dioxide (SiO2)

Fuchsite (Chrome Mica) (Chromian Muscovite - K(Al,Cr)2(AlSi3O10)(OH)2) — mineral

Fuchsite (Chrome Mica)

Chromian Muscovite - K(Al,Cr)2(AlSi3O10)(OH)2

Fossilized Coral (Petrified Coral) (Lithostrotionella (example genus) / Scleractinia) — fossil

Fossilized Coral (Petrified Coral)

Lithostrotionella (example genus) / Scleractinia

Agate (Silicon Dioxide (SiO2)) — mineral

Agate

Silicon Dioxide (SiO2)

Petrified Wood (Silicified Wood (primarily Chalcedony/Quartz, SiO2)) — fossil

Petrified Wood

Silicified Wood (primarily Chalcedony/Quartz, SiO2)

Jasper with Chalcedony (Silicon Dioxide (SiO2)) — sedimentary

Jasper with Chalcedony

Silicon Dioxide (SiO2)

Red Jasper (Chalcedony with Iron Oxide (SiO2 with Fe2O3)) — sedimentary

Red Jasper

Chalcedony with Iron Oxide (SiO2 with Fe2O3)

Quartz Pebbles and Agates (Silicon Dioxide (SiO2)) — mineral

Quartz Pebbles and Agates

Silicon Dioxide (SiO2)

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

Jasper (specifically Yellow Jasper and Red Jasper)

Silicon Dioxide (SiO2) with iron oxide inclusions

Agate (Carnelian/Chalcedony) (Silicon Dioxide (SiO2)) — mineral

Agate (Carnelian/Chalcedony)

Silicon Dioxide (SiO2)

Blue Banded Agate (Dyed) (Silicon Dioxide (SiO2) - Chalcedony variety) — mineral

Blue Banded Agate (Dyed)

Silicon Dioxide (SiO2) - Chalcedony variety

Banded Agate (specifically Lake Superior Agate style) (Agate (Cryptocrystalline Quartz), SiO2) — mineral

Banded Agate (specifically Lake Superior Agate style)

Agate (Cryptocrystalline Quartz), SiO2

Jasper (Silicon dioxide (SiO2)) — sedimentary

Jasper

Silicon dioxide (SiO2)

Petrified Wood (Silicified wood (primarily Silicon Dioxide, SiO2)) — sedimentary

Petrified Wood

Silicified wood (primarily Silicon Dioxide, SiO2)

Black Opal (Hydrated Silica (SiO2·nH2O)) — Mineraloid

Black Opal

Hydrated Silica (SiO2·nH2O)

Jasper (Jasper (Silica/Silicon Dioxide, SiO2)) — sedimentary

Jasper

Jasper (Silica/Silicon Dioxide, SiO2)

Agate (Silicon Dioxide (SiO2)) — mineral

Agate

Silicon Dioxide (SiO2)