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

Amethyst (Quartz (SiO2) with iron impurities) — mineral

Amethyst

Quartz (SiO2) with iron impurities

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

Red Jasper

Silicon Dioxide (SiO2) with iron inclusions

$Tiger\'s Eye (Pseudomorph of Quartz after Crocidolite (SiO2)) — metamorphic$

Tiger\'s Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

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

Citrine Quartz

Silicon Dioxide (SiO2) with iron impurities

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

Clear Quartz (Crystal Quartz)

Silicon Dioxide (SiO2)

Citrine (Heat-Treated) (Silicon Dioxide (SiO2)) — mineral

Citrine (Heat-Treated)

Silicon Dioxide (SiO2)

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

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Potassium Feldspar (Orthoclase (KAlSi3O8)) — mineral

Potassium Feldspar

Orthoclase (KAlSi3O8)

Blue Lace Agate (Silicon Dioxide (SiO2)) — mineral

Blue Lace Agate

Silicon Dioxide (SiO2)

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

Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Amethyst (Amethyst (Silicon Dioxide, SiO2)) — mineral

Amethyst

Amethyst (Silicon Dioxide, SiO2)

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

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

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

Prehnite

Prehnite (Ca2Al2Si3O10(OH)2)

Amazonite (Amazonite (Microcline variant: KAlSi3O8)) — mineral

Amazonite

Amazonite (Microcline variant: KAlSi3O8)

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

Red Jasper

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Red Jasper (Opaque microcrystalline quartz (SiO2) with iron inclusions) — sedimentary

Red Jasper

Opaque microcrystalline quartz (SiO2) with iron inclusions

Green Jasper (Silicon Dioxide (SiO2) with iron silicate inclusions) — sedimentary

Green Jasper

Silicon Dioxide (SiO2) with iron silicate inclusions

Rose Quartz (Silicon Dioxide (SiO2)) — mineral

Rose Quartz

Silicon Dioxide (SiO2)

Orthoclase Feldspar (Potassium Feldspar (KAlSi3O8)) — mineral

Orthoclase Feldspar

Potassium Feldspar (KAlSi3O8)

Mookaite Jasper (Mookaite (Silicified radiolarite, SiO2)) — sedimentary

Mookaite Jasper

Mookaite (Silicified radiolarite, SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Red Jasper (Beaded Necklace) (Silicon dioxide (SiO2) with iron oxide inclusions) — sedimentary

Red Jasper (Beaded Necklace)

Silicon dioxide (SiO2) with iron oxide inclusions

Carnelian (Red Agate) (Silicon Dioxide (SiO2)) — mineral

Carnelian (Red Agate)

Silicon Dioxide (SiO2)

Unakite (Unakite (Altered Granite)) — metamorphic

Unakite

Unakite (Altered Granite)

Unakite (Epidotized Granite) (Epidotized Granite (composed of Epidote, Orthoclase, and Quartz)) — metamorphic

Unakite (Epidotized Granite)

Epidotized Granite (composed of Epidote, Orthoclase, and Quartz)

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

Amazonite

Microcline (KAlSi3O8) with lead impurities

Tiger's Eye (Pseudomorph of Quartz after Crocidolite (SiO2)) — metamorphic

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Lake Superior Agate (Banded Chalcedony (Silicon Dioxide, SiO2)) — sedimentary

Lake Superior Agate

Banded Chalcedony (Silicon Dioxide, SiO2)

Red Jasper (Opaque Microcrystalline Quartz (SiO2 with Fe2O3)) — sedimentary

Red Jasper

Opaque Microcrystalline Quartz (SiO2 with Fe2O3)

Peridotite (Dunite) (Olivine-rich Peridotite ((Mg,Fe)2SiO4)) — igneous

Peridotite (Dunite)

Olivine-rich Peridotite ((Mg,Fe)2SiO4)

Quartz (Iron-stained) (Silicon Dioxide (SiO2)) — mineral

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Amazonite (K(AlSi3O8) - Potassium aluminum silicate) — mineral

Amazonite

K(AlSi3O8) - Potassium aluminum silicate

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

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

Citrine Quartz

Silicon Dioxide (SiO2) with ferric iron impurities

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

Citrine Quartz

Silicon Dioxide (SiO2) with iron impurities

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Tiger's Eye (Pseudomorph of Quartz after Crocidolite (SiO2 with inclusions of Iron Oxide)) — Metamorphic

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with inclusions of Iron Oxide)

Chrysocolla (Hydrated copper silicate (Cu,Al)2H2Si2O5(OH)4·nH2O) — mineral

Chrysocolla

Hydrated copper silicate (Cu,Al)2H2Si2O5(OH)4·nH2O

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Labradorite/Larvikite (Plagioclase Feldspar (Na,Ca)(Al,Si)4O8) — mineral

Labradorite/Larvikite

Plagioclase Feldspar (Na,Ca)(Al,Si)4O8