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 in Basalt (Xenocryst) (Silicon Dioxide (SiO2) in Mafic Igneous Volcanic Rock) — Igneous

Quartz in Basalt (Xenocryst)

Silicon Dioxide (SiO2) in Mafic Igneous Volcanic Rock

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

Rough Quartz (Clear Quartz)

Silicon Dioxide (SiO2)

Pyrite on Quartz (Fool's Gold in Quartz) (Iron Sulfide (FeS2) on Silicon Dioxide (SiO2)) — mineral

Pyrite on Quartz (Fool's Gold in Quartz)

Iron Sulfide (FeS2) on Silicon Dioxide (SiO2)

Pyrite (Iron Pyrite) (Iron Disulfide (FeS2)) — mineral

Pyrite (Iron Pyrite)

Iron Disulfide (FeS2)

Feldspar-rich Pegmatite (Granitic Pegmatite (principally KAlSi3O8)) — igneous

Feldspar-rich Pegmatite

Granitic Pegmatite (principally KAlSi3O8)

Desert Rose (Gypsum rosette or Selenite (CaSO4·2H2O)) — mineral

Desert Rose

Gypsum rosette or Selenite (CaSO4·2H2O)

Amethyst quartz cluster (Quartz, SiO₂; purple color caused mainly by iron-related defects and irradiation) — mineral

Amethyst quartz cluster

Quartz, SiO₂; purple color caused mainly by iron-related defects and irradiation

Quartz Crystal Cluster (Quartz (Silicon Dioxide, SiO2)) — mineral

Quartz Crystal Cluster

Quartz (Silicon Dioxide, SiO2)

Graphic Granite (or Pegmatite) (Graphic Granite) — igneous

Graphic Granite (or Pegmatite)

Graphic Granite

Milky quartz crystal fragment (Quartz (silicon dioxide, SiO₂)) — mineral

Milky quartz crystal fragment

Quartz (silicon dioxide, SiO₂)

Druzy Quartz on Chert/Siltstone (Silicon Dioxide (SiO2) on Microcrystalline Silica/Siltstone matrix) — sedimentary

Druzy Quartz on Chert/Siltstone

Silicon Dioxide (SiO2) on Microcrystalline Silica/Siltstone matrix

Garnet in Matrix (Almandine or Spessartine Garnet in Quartz/Schist Matrix (X3Al2(SiO4)3)) — metamorphic

Garnet in Matrix

Almandine or Spessartine Garnet in Quartz/Schist Matrix (X3Al2(SiO4)3)

Amethyst Crescent (Quartz (Silicon Dioxide, SiO2)) — gemstone

Amethyst Crescent

Quartz (Silicon Dioxide, SiO2)

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

Tumbled Rose Quartz

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

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

Amethyst

Silicon Dioxide (Quartz variety), SiO2

Quartz (Rose Quartz or Jasper variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Rose Quartz or Jasper variety)

Silicon Dioxide (SiO2)

Amethyst (Quartz (SiO2)) — gemstone

Amethyst

Quartz (SiO2)

Blue Quartz (Silicon Dioxide (SiO2) with inclusions) — mineral

Blue Quartz

Silicon Dioxide (SiO2) with inclusions

Blue Calcite (Calcite (Calcium Carbonate, CaCO3)) — mineral

Blue Calcite

Calcite (Calcium Carbonate, CaCO3)

Amethyst (Quartz (Silicon Dioxide, SiO2)) — gemstone

Amethyst

Quartz (Silicon Dioxide, SiO2)

Yellow Aventurine (Quartz (Silicon Dioxide, SiO2) with inclusions) — mineral

Yellow Aventurine

Quartz (Silicon Dioxide, SiO2) with inclusions

Quartz Geode (Silicon Dioxide (SiO2)) — sedimentary

Quartz Geode

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Yellow Calcite (Calcium Carbonate (CaCO3)) — mineral

Yellow Calcite

Calcium Carbonate (CaCO3)

Amethyst (Quartz (Silicon Dioxide, SiO2)) — gemstone

Amethyst

Quartz (Silicon Dioxide, SiO2)

Dragon Vein Agate (Dyed/Fractured Quartz) (Silicon dioxide (SiO2)) — gemstone

Dragon Vein Agate (Dyed/Fractured Quartz)

Silicon dioxide (SiO2)

Amethyst (Quartz (SiO2)) — gemstone

Amethyst

Quartz (SiO2)

Heart-shaped Quartz (Silicon Dioxide (SiO2)) — mineral

Heart-shaped Quartz

Silicon Dioxide (SiO2)

Titanium Quartz (Aura Quartz) (Silicon Dioxide (SiO2) treated with Titanium) — mineral

Titanium Quartz (Aura Quartz)

Silicon Dioxide (SiO2) treated with Titanium

Banded Agate (Tumbled) (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — mineral

Banded Agate (Tumbled)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Green Quartz / Prasiolite (Silicon Dioxide (SiO2)) — mineral

Green Quartz / Prasiolite

Silicon Dioxide (SiO2)

Amethyst (Carved Wolf Mini Figurine) (Silicon Dioxide (SiO2)) — gemstone

Amethyst (Carved Wolf Mini Figurine)

Silicon Dioxide (SiO2)

Aura Quartz Geode (Angel Aura Quartz) (Silicon Dioxide (SiO2) bonded with precious metals) — mineral

Aura Quartz Geode (Angel Aura Quartz)

Silicon Dioxide (SiO2) bonded with precious metals

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Yellow Quartz (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz

Silicon Dioxide (SiO2)

Tumbled Agate (Silicon Dioxide (Chalcedony variety), SiO2) — mineral

Tumbled Agate

Silicon Dioxide (Chalcedony variety), SiO2

White Quartz (Carved Star) (Silicon Dioxide (SiO2)) — mineral

White Quartz (Carved Star)

Silicon Dioxide (SiO2)

Yellow Calcite (Polished Pebble) (Calcium Carbonate (CaCO3)) — mineral

Yellow Calcite (Polished Pebble)

Calcium Carbonate (CaCO3)

Blue Dyed Agate (Chalcedony (Silicon Dioxide, SiO2)) — mineral

Blue Dyed Agate

Chalcedony (Silicon Dioxide, SiO2)

Prasiolite (Green Quartz) / Sea Glass Amalgam (SiO2 (Silicon Dioxide)) — mineral

Prasiolite (Green Quartz) / Sea Glass Amalgam

SiO2 (Silicon Dioxide)

Moonstone (with Tourmaline/Mica) (Orthoclase/Albite Feldspar (KAlSi3O8 / NaAlSi3O8)) — mineral

Moonstone (with Tourmaline/Mica)

Orthoclase/Albite Feldspar (KAlSi3O8 / NaAlSi3O8)

Dyed Blue Agate (Chalcedony (Silicon Dioxide / SiO2)) — mineral

Dyed Blue Agate

Chalcedony (Silicon Dioxide / SiO2)