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

Obsidian (Extrusive igneous volcanic glass) — igneous

Obsidian

Extrusive igneous volcanic glass

Amazonite (K(AlSi3O8), Microcline (potassium feldspar)) — mineral

Amazonite

K(AlSi3O8), Microcline (potassium feldspar)

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

Amethyst

Amethyst (Silicon Dioxide, SiO2)

Amethyst (Silicon Dioxide (SiO2) with iron impurities) — mineral

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

Arfvedsonite (Arfvedsonite [Na3(Fe2+,Mg)4Fe3+Si8O22(OH)2]) — mineral

Arfvedsonite

Arfvedsonite [Na3(Fe2+,Mg)4Fe3+Si8O22(OH)2]

Amethyst (Amethyst (variety of Quartz, SiO2)) — mineral

Amethyst

Amethyst (variety of Quartz, SiO2)

Amethyst Geode (Amethyst (SiO2 with iron impurities)) — mineral

Amethyst Geode

Amethyst (SiO2 with iron impurities)

Yellow Quartz (Citrine or Iron-stained Quartz) (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz (Citrine or Iron-stained Quartz)

Silicon Dioxide (SiO2)

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

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

Citrine

Silicon Dioxide (SiO2) with iron impurities

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

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

Golden Quartz (Citrine or Iron-stained Quartz) (Silicon Dioxide (SiO2)) — mineral

Golden Quartz (Citrine or Iron-stained Quartz)

Silicon Dioxide (SiO2)

Quartz Fragment (Silicon Dioxide (SiO2)) — mineral

Quartz Fragment

Silicon Dioxide (SiO2)

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

Quartz (Grain)

Silicon Dioxide (SiO2)

Mahogany Obsidian (Volcanic glass (high silica) with inclusions of Magnetite or Hematite) — igneous

Mahogany Obsidian

Volcanic glass (high silica) with inclusions of Magnetite or Hematite

Basalt Porphyry (Porphyritic Basalt) — igneous

Basalt Porphyry

Porphyritic Basalt

Rose Quartz (Silicon Dioxide (SiO2) with inclusions of Dumortierite or similar minerals) — mineral

Rose Quartz

Silicon Dioxide (SiO2) with inclusions of Dumortierite or similar minerals

Dyed Imperial Jasper (Sea Sediment Jasper) (Silicon Dioxide (SiO2) - Impure Quartz/Chalcedony) — sedimentary

Dyed Imperial Jasper (Sea Sediment Jasper)

Silicon Dioxide (SiO2) - Impure Quartz/Chalcedony

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

Honey Calcite

Calcite (Calcium Carbonate, CaCO3)

Blue Sapphire (Raw/Tumbled Corundum) (Corundum (Aluminum Oxide, Al2O3 with Fe/Ti traces)) — mineral

Blue Sapphire (Raw/Tumbled Corundum)

Corundum (Aluminum Oxide, Al2O3 with Fe/Ti traces)

Garnet Schist (Almandine Garnet-Mica Schist (X₃Y₂(SiO₄)₃)) — metamorphic

Garnet Schist

Almandine Garnet-Mica Schist (X₃Y₂(SiO₄)₃)

Marble (Recrystallized Calcite (CaCO3)) — metamorphic

Marble

Recrystallized Calcite (CaCO3)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

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

Quartz Geode Fragment

Silicon Dioxide (SiO2)

Marble (Metamorphosed Limestone (CaCO3)) — metamorphic

Marble

Metamorphosed Limestone (CaCO3)

Porphyritic Basalt (Chinese Writing Stone) (Porphyritic Basalt with Feldspar phenocrysts) — igneous

Porphyritic Basalt (Chinese Writing Stone)

Porphyritic Basalt with Feldspar phenocrysts

Granite (Granite (composed mainly of Quartz, Alkali Feldspar, and Plagioclase)) — igneous

Granite

Granite (composed mainly of Quartz, Alkali Feldspar, and Plagioclase)

Quartz Geode (Silicon Dioxide (SiO2)) — mineral

Quartz Geode

Silicon Dioxide (SiO2)

Granite (Felsic intrusive igneous rock) — igneous

Granite

Felsic intrusive igneous rock

Zebra Jasper (Silicified sedimentary rock (SiO2) with mineral inclusions) — sedimentary

Zebra Jasper

Silicified sedimentary rock (SiO2) with mineral inclusions

Amethyst Gemstone (Crystalline Quartz (SiO2 with iron impurities)) — gemstone

Amethyst Gemstone

Crystalline Quartz (SiO2 with iron impurities)

Anyolite (Ruby in Zoisite (Zoisite with Corundum)) — metamorphic

Anyolite

Ruby in Zoisite (Zoisite with Corundum)

Tree Agate (Silicon Dioxide (SiO2) with Chlorite inclusions) — mineral

Tree Agate

Silicon Dioxide (SiO2) with Chlorite inclusions

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

Red Jasper

Silicon Dioxide with Hematite inclusions (SiO2 + Fe2O3)

Heat-Treated Citrine (Silicon Dioxide (SiO2)) — mineral

Heat-Treated Citrine

Silicon Dioxide (SiO2)

Yellow Jasper (Chalcedony (SiO2 with iron oxide inclusions)) — sedimentary

Yellow Jasper

Chalcedony (SiO2 with iron oxide inclusions)

Yellow Jasper / Chalcedony (Silicon Dioxide (SiO2) with iron inclusions) — mineral

Yellow Jasper / Chalcedony

Silicon Dioxide (SiO2) with iron inclusions

Geode (Unopened) (Siliceous Geode (SiO2)) — sedimentary

Geode (Unopened)

Siliceous Geode (SiO2)

Green Aventurine (Aventurine Quartz (SiO2 with inclusions of Fuchsite)) — Mineral

Green Aventurine

Aventurine Quartz (SiO2 with inclusions of Fuchsite)