Rock Identifier

Category

Crystal

Browse crystal specimens identified by the Rock Identifier community.

Learn about Crystal in the encyclopedia

Amethyst

Ametrine

Apophyllite

Aquamarine Crystal

Aquamarine Crystal

Aventurine

Blue Quartz

Brandberg Amethyst

Brandberg Amethyst

Cactus Quartz

Cathedral Quartz

Cathedral Quartz

Chevron Amethyst

Chevron Amethyst

Clear Quartz

Danburite

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

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

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

Yellow Quartz (Citrine/Yellow Jasper)

Silicon Dioxide (SiO2)

Black Tourmaline (Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)) — mineral

Black Tourmaline

Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)

Granite (Granite (Felsic Plutonic Rock)) — igneous

Granite

Granite (Felsic Plutonic Rock)

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

Citrine Quartz

Silicon Dioxide (SiO2) with iron impurities

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Copper Ore (with Azurite and Malachite) (Cuprite, Azurite (Cu3(CO3)2(OH)2), Malachite (Cu2(CO3)(OH)2)) — mineral

Copper Ore (with Azurite and Malachite)

Cuprite, Azurite (Cu3(CO3)2(OH)2), Malachite (Cu2(CO3)(OH)2)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Almandine Garnet (Almandine, Fe3Al2(SiO4)3) — mineral

Almandine Garnet

Almandine, Fe3Al2(SiO4)3

Garnet Schist (Almandine Garnet in Mica Schist (Fe3Al2(SiO4)3)) — metamorphic

Garnet Schist

Almandine Garnet in Mica Schist (Fe3Al2(SiO4)3)

Pegmatite (Pegmatitic Granite) — igneous

Pegmatite

Pegmatitic Granite

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

Amethyst (Quartz)

SiO2 (Silicon Dioxide)

Yellow Quartz River Pebble (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz River Pebble

Silicon Dioxide (SiO2)

Angelite (Anhydrous Calcium Sulfate (CaSO4)) — mineral

Angelite

Anhydrous Calcium Sulfate (CaSO4)

White Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

White Quartz Pebble

Silicon Dioxide (SiO2)

Granite (Phaneritic intrusive igneous rock (composed mainly of Quartz SiO2, Feldspar KAlSi3O8, and Biotite/Mica)) — igneous

Granite

Phaneritic intrusive igneous rock (composed mainly of Quartz SiO2, Feldspar KAlSi3O8, and Biotite/Mica)

Quartz Geode (Silicon Dioxide (SiO2)) — mineral

Quartz Geode

Silicon Dioxide (SiO2)

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

Milky Quartz Pebble

Silicon Dioxide (SiO2)

Diamond (in a jewelry setting) (Carbon (C)) — mineral

Diamond (in a jewelry setting)

Carbon (C)

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

Quartz Geode Fragment

Crystalline Silicon Dioxide (SiO2)

Amethyst (SiO2 (Silicon Dioxide)) — Mineral

Amethyst

SiO2 (Silicon Dioxide)

Rose Quartz (SiO2 (Silicon Dioxide)) — mineral

Rose Quartz

SiO2 (Silicon Dioxide)

Amethyst Quartz (Silicon Dioxide (SiO2)) — mineral

Amethyst Quartz

Silicon Dioxide (SiO2)

Chalcedony (Agate/Carnelian pebbles) (Cryptocrystalline Quartz (SiO2)) — mineral

Chalcedony (Agate/Carnelian pebbles)

Cryptocrystalline Quartz (SiO2)

Yellow Jasper (Silicon Dioxide (SiO2) with goethite or iron oxide inclusions) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) with goethite or iron oxide inclusions

Citrine Quartz (Crystalline Quartz (SiO2 with iron impurities)) — mineral

Citrine Quartz

Crystalline Quartz (SiO2 with iron impurities)

Heat-Treated Amethyst (Commercial Citrine) (Silicon Dioxide (SiO2) - Macro-crystalline Quartz) — mineral

Heat-Treated Amethyst (Commercial Citrine)

Silicon Dioxide (SiO2) - Macro-crystalline Quartz

Yellow Calcite (Calcium Carbonate (CaCO3)) — mineral

Yellow Calcite

Calcium Carbonate (CaCO3)

Banded Calcite (often sold as Caribbean Calcite or Pink Calcite) (Calcium Carbonate (CaCO3)) — mineral

Banded Calcite (often sold as Caribbean Calcite or Pink Calcite)

Calcium Carbonate (CaCO3)

Granite (Pink/Potassium Feldspar rich) (Granite (K-feldspar rich intrusive igneous rock)) — igneous

Granite (Pink/Potassium Feldspar rich)

Granite (K-feldspar rich intrusive igneous rock)

Aventurine (Silicon Dioxide (SiO2) with Fuchsite inclusions) — metamorphic

Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Rose Quartz (Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese) — mineral

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Moss Agate with Quartz Druzy (Chalcedony with inclusions (SiO2)) — mineral

Moss Agate with Quartz Druzy

Chalcedony with inclusions (SiO2)

Green Calcite (Calcium Carbonate (CaCO3)) — mineral

Green Calcite

Calcium Carbonate (CaCO3)

Milky Quartz with Chlorite/Moss Infusions (Silicon Dioxide (SiO2)) — mineral

Milky Quartz with Chlorite/Moss Infusions

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)