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

Quartz Druzy on Agate (River Cobble) (Silicon Dioxide (SiO2)) — Mineral / Sedimentary (often associated with volcanic hosts)

Quartz Druzy on Agate (River Cobble)

Silicon Dioxide (SiO2)

Mineral / Sedimentary (often associated with volcanic hosts)

Pink Tourmaline in Quartz Matrix (Elbaite (Na(Li,Al)3Al6(Si6O18)(BO3)3(OH)4) in Quartz (SiO2)) — mineral

Pink Tourmaline in Quartz Matrix

Elbaite (Na(Li,Al)3Al6(Si6O18)(BO3)3(OH)4) in Quartz (SiO2)

Rutilated Quartz (SiO2 with TiO2 inclusions (Quartz with Rutile)) — mineral

Rutilated Quartz

SiO2 with TiO2 inclusions (Quartz with Rutile)

Rutilated Quartz (SiO2 with TiO2 inclusions) — Mineral

Rutilated Quartz

SiO2 with TiO2 inclusions

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

Quartz Druzy (Geode Fragment)

Silicon Dioxide (SiO2)

Desert Rose (Gypsum (variety Selenite) or Barite, CaSO4·2H2O) — mineral

Desert Rose

Gypsum (variety Selenite) or Barite, CaSO4·2H2O

Porphyritic Basalt (Porphyritic Mafic Extrusive Rock) — igneous

Porphyritic Basalt

Porphyritic Mafic Extrusive Rock

Quartzite pebble (Meta-quartzite (SiO2)) — metamorphic

Quartzite pebble

Meta-quartzite (SiO2)

Porphyry (Flower Stone) (Porphyry (Andesite or Basalt matrix)) — igneous

Porphyry (Flower Stone)

Porphyry (Andesite or Basalt matrix)

Rose Quartz (SiO2 (Crystalline Quartz with trace inclusions)) — mineral

Rose Quartz

SiO2 (Crystalline Quartz with trace inclusions)

Pallasite Meteorite (Pallasite (Stony-iron meteorite; Fe-Ni alloy with (Mg,Fe)2SiO4 olivine)) — Mineral/Extraterrestrial Rock

Pallasite Meteorite

Pallasite (Stony-iron meteorite; Fe-Ni alloy with (Mg,Fe)2SiO4 olivine)

Mineral/Extraterrestrial Rock

Basalt with Plagioclase Phenocrysts (Porphyritic Basalt) — igneous

Basalt with Plagioclase Phenocrysts

Porphyritic Basalt

Marble (Recrystallized Carbonate Rock (CaCO3)) — metamorphic

Marble

Recrystallized Carbonate Rock (CaCO3)

Porphyritic Andesite (Andesite) — igneous

Porphyritic Andesite

Andesite

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Blue Sapphire (Corundum (Al2O3 - Aluminum Oxide)) — mineral

Blue Sapphire

Corundum (Al2O3 - Aluminum Oxide)

Milky Quartz with Iron Inclusions (Crystalline Silicon Dioxide (SiO2)) — mineral

Milky Quartz with Iron Inclusions

Crystalline Silicon Dioxide (SiO2)

Granite (Phaneritic plutonic rock (Quartz, Feldspar, Mica)) — igneous

Granite

Phaneritic plutonic rock (Quartz, Feldspar, Mica)

Quartz Geode (Silicon Dioxide (SiO2)) — mineral

Quartz Geode

Silicon Dioxide (SiO2)

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

Quartz (Druzy)

Silicon Dioxide (SiO2)

Red Quartz (Ferruginous Quartz) (Silicon Dioxide with Hematite inclusions (SiO2 + Fe2O3)) — mineral

Red Quartz (Ferruginous Quartz)

Silicon Dioxide with Hematite inclusions (SiO2 + Fe2O3)

Epidote and Quartz in Basalt Porpohyry (Epidote bearing Porphyritic Basalt with Quartz Veins) — igneous

Epidote and Quartz in Basalt Porpohyry

Epidote bearing Porphyritic Basalt with Quartz Veins

Satin Spar Selenite (Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O) — mineral

Satin Spar Selenite

Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O

Emerald in Host Rock (Beryl (Be3Al2Si6O18) containing Chromium and/or Vanadium) — mineral

Emerald in Host Rock

Beryl (Be3Al2Si6O18) containing Chromium and/or Vanadium

Granite (Granite (Felsic Plutonic Rock / SiO2 + Al2O3 + K2O + Na2O + CaO + FeO + MgO)) — igneous

Granite

Granite (Felsic Plutonic Rock / SiO2 + Al2O3 + K2O + Na2O + CaO + FeO + MgO)

Granodiorite (Granodiorite (Intermediate plutonic rock)) — igneous

Granodiorite

Granodiorite (Intermediate plutonic rock)

Schist with Garnet inclusions (Garnet-mica-schist) — metamorphic

Schist with Garnet inclusions

Garnet-mica-schist

Quartz / Quartzite (Silicon Dioxide (SiO2)) — Mineral / Metamorphic

Quartz / Quartzite

Silicon Dioxide (SiO2)

Mineral / Metamorphic

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Dendritic Quartz (Silicon Dioxide (SiO2) with Manganese Oxide inclusions) — mineral

Dendritic Quartz

Silicon Dioxide (SiO2) with Manganese Oxide inclusions

Beryl (Variety Mix) (Be3Al2(Si6O18)) — Mineral

Beryl (Variety Mix)

Be3Al2(Si6O18)

$Black Tourmaline (Schorl (Na(Fe2+)_{3}Al_{6} (BO_{3})_{3} (Si_{6}O_{18})(OH)_{4})) — Mineral$

Black Tourmaline

Schorl (Na(Fe2+)_{3}Al_{6} (BO_{3})_{3} (Si_{6}O_{18})(OH)_{4})

Feldspar-rich Granite (Granite (primarily Orthoclase and Quartz)) — igneous

Feldspar-rich Granite

Granite (primarily Orthoclase and Quartz)

Granite (Granite (Phaneritic Igneous Rock)) — igneous

Granite

Granite (Phaneritic Igneous Rock)

Porphyritic Andesite (Andesite (Intermediate Extrusive Volcanic Rock)) — igneous

Porphyritic Andesite

Andesite (Intermediate Extrusive Volcanic Rock)

Diamond (Diamond (C)) — mineral

Diamond

Diamond (C)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Mahogany Obsidian (Volcanic Glass with Hematite or Magnetite (SiO2 + Fe2O3)) — igneous

Mahogany Obsidian

Volcanic Glass with Hematite or Magnetite (SiO2 + Fe2O3)

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

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Obsidian (Obsidian (Volcanic Glass)) — igneous

Obsidian

Obsidian (Volcanic Glass)