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 (Quartz (Silicon Dioxide, SiO2)) — mineral

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Septarian Nodule (Dragon Stone) sphere (Septarian concretion (Calcite, Aragonite, and Limestone)) — sedimentary

Septarian Nodule (Dragon Stone) sphere

Septarian concretion (Calcite, Aragonite, and Limestone)

Green Fluorite in Host Rock (Fluorite (Calcium Fluoride, CaF2)) — mineral

Green Fluorite in Host Rock

Fluorite (Calcium Fluoride, CaF2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Rose Quartz Druzy (Silicon Dioxide (SiO2)) — mineral

Rose Quartz Druzy

Silicon Dioxide (SiO2)

Granite (Phaneritic Plutonic Felsic Rock (Granite)) — igneous

Granite

Phaneritic Plutonic Felsic Rock (Granite)

Garnet-Mica Schist (Garnetiferous Porphyroblastic Schist) — metamorphic

Garnet-Mica Schist

Garnetiferous Porphyroblastic Schist

Smoky Quartz and Chalcedony Geode Fragment (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz and Chalcedony Geode Fragment

Silicon Dioxide (SiO2)

Vesuvianite (Idocrase) (Ca19(Al, Mg, Fe)13(SiO4)10(Si2O7)4(OH, F, O)10) — mineral

Vesuvianite (Idocrase)

Ca19(Al, Mg, Fe)13(SiO4)10(Si2O7)4(OH, F, O)10

Celestine (Celestite) (Strontium sulfate (SrSO4)) — mineral

Celestine (Celestite)

Strontium sulfate (SrSO4)

White Marble (often sold as Caribbean Calcite or Pistachio Calcite in this form) (Recrystallized Calcite (CaCO3)) — metamorphic

White Marble (often sold as Caribbean Calcite or Pistachio Calcite in this form)

Recrystallized Calcite (CaCO3)

Pegmatite with Smoky Quartz and Feldspar (Pegmatite (Quartz: SiO2, Feldspar: KAlSi3O8)) — igneous

Pegmatite with Smoky Quartz and Feldspar

Pegmatite (Quartz: SiO2, Feldspar: KAlSi3O8)

Jasper with Quartz Druzy (Silicon Dioxide (SiO2)) — sedimentary

Jasper with Quartz Druzy

Silicon Dioxide (SiO2)

Granite (Phaneritic Igneous Rock (Granite)) — igneous

Granite

Phaneritic Igneous Rock (Granite)

Cubic Zirconia (Zirconium dioxide (ZrO2)) — mineral

Cubic Zirconia

Zirconium dioxide (ZrO2)

Quartz Geode (Silicon Dioxide (SiO2)) — sedimentary

Quartz Geode

Silicon Dioxide (SiO2)

Quartz Geode (Crystalline Silicon Dioxide (SiO2) in a Geode) — mineral

Quartz Geode

Crystalline Silicon Dioxide (SiO2) in a Geode

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

Quartz Geode Fragment

Silicon Dioxide (SiO2)

Nephrite Jade (Ca2(Mg,Fe)5Si8O22(OH)2) — metamorphic

Nephrite Jade

Ca2(Mg,Fe)5Si8O22(OH)2

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

Quartz (Smoky Quartz variant)

Silicon Dioxide (SiO2)

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

Clear Quartz Sphere

Silicon Dioxide (SiO2)

Peridotite (Dunite) (Peridotite (mostly Olivine: (Mg,Fe)2SiO4)) — igneous

Peridotite (Dunite)

Peridotite (mostly Olivine: (Mg,Fe)2SiO4)

Quartz Geode (Quartz (Silicon Dioxide, SiO2)) — Mineral

Quartz Geode

Quartz (Silicon Dioxide, SiO2)

Quartz Geode (Silicon Dioxide (SiO2)) — Mineral/Sedimentary

Quartz Geode

Silicon Dioxide (SiO2)

Mineral/Sedimentary

Epidote (Epidote (Ca2(Al,Fe)3(SiO4)3(OH))) — mineral

Epidote

Epidote (Ca2(Al,Fe)3(SiO4)3(OH))

Quartz Geode (Crystalline Silicon Dioxide (SiO2) within a geode structure) — mineral

Quartz Geode

Crystalline Silicon Dioxide (SiO2) within a geode structure

Sapphire (Corundum (Al2O3)) — gemstone

Sapphire

Corundum (Al2O3)

Blue Sapphire (Raw) (Corundum (Al2O3)) — mineral

Blue Sapphire (Raw)

Corundum (Al2O3)

Citrine Quartz (Silicon Dioxide (SiO2)) — mineral

Citrine Quartz

Silicon Dioxide (SiO2)

Pink Thulite (in Pumice-like texture) (Pink Zoisite (Mn-bearing Zoisite), Ca2Al3(SiO4)3(OH)) — metamorphic

Pink Thulite (in Pumice-like texture)

Pink Zoisite (Mn-bearing Zoisite), Ca2Al3(SiO4)3(OH)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Parti Sapphire (Corundum (Al2O3)) — mineral

Parti Sapphire

Corundum (Al2O3)

Quartz Pebble (with probable iron staining) (Silicon dioxide (SiO2)) — mineral

Quartz Pebble (with probable iron staining)

Silicon dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Rhodonite (Rhodonite (Manganese Iron Magnesium Calcium Silicate - (Mn,Fe,Mg,Ca)SiO3)) — mineral

Rhodonite

Rhodonite (Manganese Iron Magnesium Calcium Silicate - (Mn,Fe,Mg,Ca)SiO3)

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

Yellow Quartz (Citrine-colored Quartz)

Silicon Dioxide (SiO2)

Aventurine (Quartz with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)) — mineral

Aventurine

Quartz with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)

Blue Sapphire (in a faceted jewelry setting) (Corundum (Al2O3) with trace Iron and Titanium) — mineral

Blue Sapphire (in a faceted jewelry setting)

Corundum (Al2O3) with trace Iron and Titanium

Diamond (Carbon (C)) — gemstone

Diamond

Carbon (C)

Labradorite ((Ca, Na)(Al, Si)4O8) — mineral

Labradorite

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

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

Black Tourmaline

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

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)