Rock Identifier

Category

Gemstone

Browse gemstone specimens identified by the Rock Identifier community.

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Achroite

Achroite

Alexandrite

Alexandrite

Almandine Garnet

Almandine Garnet

Amber

Amber

Andamooka Opal

Andamooka Opal

Andesine

Andesine

Andesine-Labradorite

Andesine-Labradorite

Andradite Garnet

Andradite Garnet

Ant Hill Garnet

Ant Hill Garnet

Aquamarine

Aquamarine

Australian Opal

Australian Opal

Aventurine Feldspar

Aventurine Feldspar

Carnelian (Carnelian (SiO2)) — mineral

Carnelian

Carnelian (SiO2)

mineral
Jasper (Silicon dioxide (SiO2)) — sedimentary

Jasper

Silicon dioxide (SiO2)

sedimentary
Amethyst (Raw Quartz) (Silicon Dioxide (SiO2) with iron impurities) — mineral

Amethyst (Raw Quartz)

Silicon Dioxide (SiO2) with iron impurities

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

Smoky Quartz

SiO2 (Silicon Dioxide)

mineral
Carnelian (Cryptocrystalline Quartz (SiO2)) — mineral

Carnelian

Cryptocrystalline Quartz (SiO2)

mineral
Smoky Quartz occurring with Feldspar (Silicon Dioxide (SiO2) with Potassium Aluminum Silicate (KAlSi3O8)) — mineral

Smoky Quartz occurring with Feldspar

Silicon Dioxide (SiO2) with Potassium Aluminum Silicate (KAlSi3O8)

mineral
Agate (Crazy Lace or Eye Agate) (Silicon Dioxide (SiO2)) — mineral

Agate (Crazy Lace or Eye Agate)

Silicon Dioxide (SiO2)

mineral
Beryl in Quartz Matrix (Beryllium Aluminum Silicate (Be3Al2Si6O18)) — mineral

Beryl in Quartz Matrix

Beryllium Aluminum Silicate (Be3Al2Si6O18)

mineral
Quartz (small fragment) (Silicon Dioxide (SiO2)) — mineral

Quartz (small fragment)

Silicon Dioxide (SiO2)

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

mineral
Peridotite (Peridotite (primarily Olivine and Pyroxene)) — igneous

Peridotite

Peridotite (primarily Olivine and Pyroxene)

igneous
Amazonite (Amazonite (KAlSi3O8 - Microcline)) — mineral

Amazonite

Amazonite (KAlSi3O8 - Microcline)

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

Smoky Quartz

Silicon Dioxide (SiO2)

mineral
Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

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

Amethyst (Faceted)

Quartz (SiO2) with iron impurities

Mineral
Rough Quartz (likely Rose or Smoky variant) (Silicon Dioxide (SiO2)) — mineral

Rough Quartz (likely Rose or Smoky variant)

Silicon Dioxide (SiO2)

mineral
Tiger's Eye (Silica (Quartz) pseudomorph after Crocidolite (SiO2)) — metamorphic

Tiger's Eye

Silica (Quartz) pseudomorph after Crocidolite (SiO2)

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

Quartz Pebble (Milky Quartz)

Silicon Dioxide (SiO2)

mineral
Tektite (likely Indochinite) (Tektite (high-silica impact glass)) — igneous

Tektite (likely Indochinite)

Tektite (high-silica impact glass)

igneous
Amethyst (Amethyst (Silicon Dioxide, SiO2 + trace Fe3+)) — mineral

Amethyst

Amethyst (Silicon Dioxide, SiO2 + trace Fe3+)

mineral
Clear Quartz (Silicon dioxide (SiO2)) — mineral

Clear Quartz

Silicon dioxide (SiO2)

mineral
Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)

sedimentary
Blue Chalcedony (Cryptocrystalline Quartz (SiO2)) — mineral

Blue Chalcedony

Cryptocrystalline Quartz (SiO2)

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

Amethyst

Silicon dioxide (SiO2) with iron impurities

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

Chalcedony (Agate/Carnelian variant)

Silicon Dioxide (SiO2)

mineral
Amber (Succinicum (Organic polymer, largely C10H16O)) — Organic Mineral

Amber

Succinicum (Organic polymer, largely C10H16O)

Organic Mineral
Quartz (Water-worn pebble) (Silicon Dioxide (SiO2)) — mineral

Quartz (Water-worn pebble)

Silicon Dioxide (SiO2)

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

Quartz Geode Fragment

Silicon Dioxide (SiO2)

mineral
Quartz (Rutilated) (Silicon Dioxide (SiO2) with Titanium Dioxide (TiO2) inclusions) — mineral

Quartz (Rutilated)

Silicon Dioxide (SiO2) with Titanium Dioxide (TiO2) inclusions

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

Milky Quartz

Silicon Dioxide (SiO2)

mineral
Red Jasper (Silicon Dioxide (SiO2) - Chalcedony) — mineral

Red Jasper

Silicon Dioxide (SiO2) - Chalcedony

mineral
Quartz (Milky/Gray variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky/Gray variety)

Silicon Dioxide (SiO2)

mineral
Quartz (Milky/Crystalline fragment) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky/Crystalline fragment)

Silicon Dioxide (SiO2)

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

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

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

Milky Quartz

Silicon Dioxide (SiO2)

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

Sodalite

Sodalite [Na8(Al6Si6O24)Cl2]

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

Cloudy Quartz

Silicon Dioxide (SiO2)

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

Amethyst

Amethyst (Silicon Dioxide, SiO2)

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

Clear Quartz

Silicon Dioxide (SiO2)

mineral
Pink Feldspar (Orthoclase Feldspar (KAlSi3O8)) — mineral

Pink Feldspar

Orthoclase Feldspar (KAlSi3O8)

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

Chrysocolla on Matrix

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

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

Milky Quartz

Silicon Dioxide (SiO2)

mineral