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)

Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Synthetic Blue Aura Quartz (Silicon Dioxide (SiO2) with Metallic Infusion) — mineral (synthetic/man-made coating)

Synthetic Blue Aura Quartz

Silicon Dioxide (SiO2) with Metallic Infusion

mineral (synthetic/man-made coating)

Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2 (Chromium-rich Muscovite)) — mineral

Fuchsite

K(Al,Cr)2(AlSi3O10)(OH)2 (Chromium-rich Muscovite)

Green Aventurine (Silicon Dioxide (Quartz) with inclusions of Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)) — metamorphic

Green Aventurine

Silicon Dioxide (Quartz) with inclusions of Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)

Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

Quartz (Raw and Water-worn) (Silicon Dioxide (SiO2)) — mineral

Quartz (Raw and Water-worn)

Silicon Dioxide (SiO2)

Porphyritic Basalt (or Porphyry) (Porphyritic Andesite/Basalt (primarily Plagioclase feldspar and Pyroxene)) — igneous

Porphyritic Basalt (or Porphyry)

Porphyritic Andesite/Basalt (primarily Plagioclase feldspar and Pyroxene)

Rose Quartz (Silicon Dioxide (SiO2)) — mineral

Rose Quartz

Silicon Dioxide (SiO2)

Rose Quartz (Silicon Dioxide (SiO2)) — mineral

Rose Quartz

Silicon Dioxide (SiO2)

Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Chert

Microcrystalline Quartz (SiO2)

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Calcite (Calcium Carbonate (CaCO3)) — mineral

Calcite

Calcium Carbonate (CaCO3)

Magnetite / Ironstone (Magnetite (Fe3O4)) — mineral

Magnetite / Ironstone

Magnetite (Fe3O4)

Feldspar (Orthoclase) (Potassium Feldspar (KAlSi3O8)) — mineral

Feldspar (Orthoclase)

Potassium Feldspar (KAlSi3O8)

Quartzite with Quartz Vein (Metamorphosed sandstone (SiO2)) — metamorphic

Quartzite with Quartz Vein

Metamorphosed sandstone (SiO2)

Quartz (with probable host rock) (Silicon Dioxide (SiO2)) — mineral

Quartz (with probable host rock)

Silicon Dioxide (SiO2)

Feldspar (Orthoclase) (Potassium Feldspar (KAlSi3O8)) — mineral

Feldspar (Orthoclase)

Potassium Feldspar (KAlSi3O8)

Bornite (Bornite (Cu5FeS4)) — mineral

Bornite

Bornite (Cu5FeS4)

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

Amazonite

Microcline (KAlSi3O8) with lead impurities

Pyrite (on the right) and Magnetite or Hematite (on the left) (Iron Sulfide (FeS2) and Iron Oxide (Fe3O4 or Fe2O3)) — mineral

Pyrite (on the right) and Magnetite or Hematite (on the left)

Iron Sulfide (FeS2) and Iron Oxide (Fe3O4 or Fe2O3)

Limonite (Pseudomorph after Pyrite/Marcasite) (Hydrated Iron Oxide (FeO(OH)·nH2O)) — mineral

Limonite (Pseudomorph after Pyrite/Marcasite)

Hydrated Iron Oxide (FeO(OH)·nH2O)

Prehnite (Prehnite (Ca2Al(AlSi3O10)(OH)2)) — mineral

Prehnite

Prehnite (Ca2Al(AlSi3O10)(OH)2)

Granite (Granite (Felsic Plutonic Rock)) — igneous

Granite

Granite (Felsic Plutonic Rock)

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

Granite

Phaneritic plutonic rock (Quartz, Feldspar, Mica)

Granite (Phaneritic plutonic igneous rock (SiO2 range 65-75%)) — igneous

Granite

Phaneritic plutonic igneous rock (SiO2 range 65-75%)

Quartz with Pyrite and Lichen (Silicon Dioxide (SiO2) with Iron Sulfide (FeS2)) — mineral

Quartz with Pyrite and Lichen

Silicon Dioxide (SiO2) with Iron Sulfide (FeS2)

Green Tourmaline (Elbaite (Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)4)) — mineral

Green Tourmaline

Elbaite (Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)4)

Iron-stained Quartz (Silicon Dioxide (SiO2) with Hematite/Limonite impurities) — mineral

Iron-stained Quartz

Silicon Dioxide (SiO2) with Hematite/Limonite impurities

Black Tourmaline (Schorl) (Schorl (Na(Fe^2+)3Al6(Si6O18)(BO3)3(OH)4)) — Mineral

Black Tourmaline (Schorl)

Schorl (Na(Fe^2+)3Al6(Si6O18)(BO3)3(OH)4)

Amethyst (Silicon Dioxide (SiO2) containing iron impurities and irradiation) — mineral

Amethyst

Silicon Dioxide (SiO2) containing iron impurities and irradiation

Amazonite (Potassium Feldspar (KAlSi3O8)) — mineral

Amazonite

Potassium Feldspar (KAlSi3O8)

Olivine in Basalt matrix (Olivine (Magnesium Iron Silicate - (Mg, Fe)2SiO4)) — igneous

Olivine in Basalt matrix

Olivine (Magnesium Iron Silicate - (Mg, Fe)2SiO4)

Magnetite (Iron Ore) (Magnetite (Fe3O4)) — mineral

Magnetite (Iron Ore)

Magnetite (Fe3O4)

Hematite Mineral Ore (Iron(III) oxide (Fe2O3)) — mineral

Hematite Mineral Ore

Iron(III) oxide (Fe2O3)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Fire Quartz (Hematoid Quartz) (Quartz with Hematite inclusions (SiO2 + Fe2O3)) — mineral

Fire Quartz (Hematoid Quartz)

Quartz with Hematite inclusions (SiO2 + Fe2O3)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Hematite (Iron(III) oxide (Fe2O3)) — mineral

Hematite

Iron(III) oxide (Fe2O3)

Chalcedony (Agatized Coral / Rough Chalcedony Node) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Agatized Coral / Rough Chalcedony Node)

Silicon Dioxide (SiO2)

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

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

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

Quartz Geode

Crystalline Silicon Dioxide (SiO2)