Rock Identifier

Category

Crystal

Browse crystal specimens identified by the Rock Identifier community.

Blue Calcite (Calcium Carbonate (CaCO3)) — mineral

Blue Calcite

Calcium Carbonate (CaCO3)

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

Green Aventurine

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

Banded Calcite (often commercially called 'Mexican Onyx') (Calcium Carbonate (CaCO3)) — mineral

Banded Calcite (often commercially called 'Mexican Onyx')

Calcium Carbonate (CaCO3)

Red Jasper (Silicon dioxide (SiO2) with Iron inclusions) — sedimentary

Red Jasper

Silicon dioxide (SiO2) with Iron inclusions

Carnelian Agate (Silicon Dioxide (SiO2) - Variety of Chalcedony) — mineral

Carnelian Agate

Silicon Dioxide (SiO2) - Variety of Chalcedony

Green Aventurine (Propably a tumbled variety) (Aventurine Quartz (SiO2 with inclusions of Fuchsite)) — mineral

Green Aventurine (Propably a tumbled variety)

Aventurine Quartz (SiO2 with inclusions of Fuchsite)

Blue Apatite (Fluorapatite (Ca5(PO4)3F)) — mineral

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Banded Jasper (Silicon Dioxide (SiO2) with iron oxide impurities) — sedimentary

Banded Jasper

Silicon Dioxide (SiO2) with iron oxide impurities

Banded Agate (specifically Carnelian Agate) (Silicon dioxide (SiO2) - Chalcedony variety) — mineral

Banded Agate (specifically Carnelian Agate)

Silicon dioxide (SiO2) - Chalcedony variety

Peacock Ore (Chalcopyrite) (Chalcopyrite (CuFeS2)) — mineral

Peacock Ore (Chalcopyrite)

Chalcopyrite (CuFeS2)

Apache Tear (Obsidian) (Hydrated volcanic glass (SiO2 with inclusions)) — igneous

Apache Tear (Obsidian)

Hydrated volcanic glass (SiO2 with inclusions)

Peach Moonstone (Orthoclase Feldspar (KAlSi3O8)) — mineral

Peach Moonstone

Orthoclase Feldspar (KAlSi3O8)

Unakite (Tumbled) (Unakite (altered granite)) — metamorphic

Unakite (Tumbled)

Unakite (altered granite)

Red Jasper (Jasper (Silicate Mineral - SiO2)) — sedimentary

Red Jasper

Jasper (Silicate Mineral - SiO2)

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

Rose Quartz

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

Red Jasper (Silicon Dioxide (SiO2) with Hematite (Fe2O3)) — sedimentary

Red Jasper

Silicon Dioxide (SiO2) with Hematite (Fe2O3)

Rutilated Quartz (Quartz (SiO2) with Rutile Inclusions (TiO2)) — Mineral

Rutilated Quartz

Quartz (SiO2) with Rutile Inclusions (TiO2)

Smoky Quartz (Chlorite Inclusions) (Silicon Dioxide (SiO2) with trace Aluminum and Natural Irradiation) — mineral

Smoky Quartz (Chlorite Inclusions)

Silicon Dioxide (SiO2) with trace Aluminum and Natural Irradiation

Green Aventurine (Silicon Dioxide (SiO2) with inclusions of Fuchsite mica) — metamorphic

Green Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite mica

Arfvedsonite in Quartz (also labeled as Astrophyllite or Nuummite by collectors) ([Na][Na2][Mg4Fe2+](Si8O22)(OH)2 in SiO2) — metamorphic

Arfvedsonite in Quartz (also labeled as Astrophyllite or Nuummite by collectors)

[Na][Na2][Mg4Fe2+](Si8O22)(OH)2 in SiO2

Geode (Unopened) (Siliceous Concretion / Geode) — sedimentary

Geode (Unopened)

Siliceous Concretion / Geode

Jasper (Silicon dioxide (SiO2)) — sedimentary

Jasper

Silicon dioxide (SiO2)

Purple Dyed Agate Geode (Banded Chalcedony) (Silicon Dioxide (SiO2) - variety: Agate) — mineral

Purple Dyed Agate Geode (Banded Chalcedony)

Silicon Dioxide (SiO2) - variety: Agate

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Amethyst Geode (Quartz (SiO₂) with iron impurities) — Mineral/Igneous (secondary formation)

Amethyst Geode

Quartz (SiO₂) with iron impurities

Mineral/Igneous (secondary formation)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

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

Celestite (Celestine)

Strontium sulfate (SrSO4)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Granite (Granite (Phaneritic igneous rock)) — igneous

Granite

Granite (Phaneritic igneous rock)

Quartz Druse (on Chalcedony/Agate base) (Silicon Dioxide (SiO2)) — mineral

Quartz Druse (on Chalcedony/Agate base)

Silicon Dioxide (SiO2)

Iceland Spar (Optical Calcite) (Calcite (Calcium Carbonate, CaCO3)) — mineral

Iceland Spar (Optical Calcite)

Calcite (Calcium Carbonate, CaCO3)

Marble (White) (Metamorphosed Limestone (mainly CaCO3)) — metamorphic

Marble (White)

Metamorphosed Limestone (mainly CaCO3)

Basalt (Basalt (Mafic volcanic rock)) — igneous

Basalt

Basalt (Mafic volcanic rock)

Diamond (as set in a metal alloy ring) (Diamond (Pure Carbon, C)) — mineral

Diamond (as set in a metal alloy ring)

Diamond (Pure Carbon, C)

Granite (Granite (compositionally: Quartz, Feldspar, Mica)) — igneous

Granite

Granite (compositionally: Quartz, Feldspar, Mica)

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

Amethyst (Quartz)

Amethyst (SiO2 with iron impurities)

Granite (Phaneritic Felsic Igneous Rock) — igneous

Granite

Phaneritic Felsic Igneous Rock

Porphyritic Rhyolite (Red Porp) (Porphyritic Rhyolite (Felsic volcanic rock)) — igneous

Porphyritic Rhyolite (Red Porp)

Porphyritic Rhyolite (Felsic volcanic rock)

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

Amethyst

Amethyst (variety of Quartz, SiO2)

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)