Rock Identifier

Category

Mineralogical Specimen

Browse mineralogical specimen specimens identified by the Rock Identifier community.

Learn about Mineralogical Specimen in the encyclopedia

Emerald in Matrix

Emerald in Matrix

Morganite Crystal

Morganite Crystal

Aquamarine Matrix

Aquamarine Matrix

Emerald Crystal

Emerald Crystal

Aquamarine Crystal

Aquamarine Crystal

Mushroom Tourmaline

Mushroom Tourmaline

White Beryl

Smoky Quartz

Clear Obsidian

Goshenite Crystal

Goshenite Crystal

Magnetite

Crocoite

Banded Sedimentary Rock (Wishbone Stone / Banded Quartzite or Limestone) (Silicified limestone or banded sedimentary rock with mineral veins) — sedimentary

Banded Sedimentary Rock (Wishbone Stone / Banded Quartzite or Limestone)

Silicified limestone or banded sedimentary rock with mineral veins

Limonite (FeO(OH)·nH2O) — mineral

Limonite

FeO(OH)·nH2O

Kidney Stone (Urolith) (Calculus renalis (Biogenic mineral aggregate)) — mineral

Kidney Stone (Urolith)

Calculus renalis (Biogenic mineral aggregate)

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Amazonite (Microcline Feldspar (KAlSi3O8)) — mineral

Amazonite

Microcline Feldspar (KAlSi3O8)

Fossiliferous Limestone (Bioclastic Limestone (Calcium Carbonate, CaCO3)) — sedimentary

Fossiliferous Limestone

Bioclastic Limestone (Calcium Carbonate, CaCO3)

Crescent Pebble (Weathered Quartzite or Sandstone Fragment) — sedimentary

Crescent Pebble

Weathered Quartzite or Sandstone Fragment

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Quartz (Iron-stained) (Silicon Dioxide (SiO2)) — mineral

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Carnelian Agate (Silicon Dioxide (SiO2) - Chalcedony variety) — gemstone

Carnelian Agate

Silicon Dioxide (SiO2) - Chalcedony variety

Tiger's Eye (Silicon dioxide (Quartz pseudomorph after crocidolite), SiO2) — gemstone

Tiger's Eye

Silicon dioxide (Quartz pseudomorph after crocidolite), SiO2

Quartz Geode with Chalcedony (Silicon Dioxide (SiO2)) — mineral

Quartz Geode with Chalcedony

Silicon Dioxide (SiO2)

Quartz Pebble (Iron-Stained Quartz) (Silicon Dioxide (SiO2) with Hematite/Limonite inclusion) — mineral

Quartz Pebble (Iron-Stained Quartz)

Silicon Dioxide (SiO2) with Hematite/Limonite inclusion

Jasper (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Jasper

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Chocolate Jasper (Microcrystalline Quartz (SiO2) with impurities) — sedimentary

Chocolate Jasper

Microcrystalline Quartz (SiO2) with impurities

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

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

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Chrysocolla (Cu2-xAlx(H2O)n(H2Si2O5)5 · nH2O (Hydrated copper aluminum silicate)) — mineral

Chrysocolla

Cu2-xAlx(H2O)n(H2Si2O5)5 · nH2O (Hydrated copper aluminum silicate)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Sandstone with Dendritic Inclusions (Quartzose Sandstone) — sedimentary

Sandstone with Dendritic Inclusions

Quartzose Sandstone

Quartz in Matrix (or Quartz Vein Rock) (Silicon Dioxide (SiO2) with host rock) — igneous

Quartz in Matrix (or Quartz Vein Rock)

Silicon Dioxide (SiO2) with host rock

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Iron-stained Quartz (Silicon Dioxide with Iron Oxide (SiO2 with Fe2O3)) — mineral

Iron-stained Quartz

Silicon Dioxide with Iron Oxide (SiO2 with Fe2O3)

Quartz Pebble (with Feldspar/Mica) (Granitic Quartz / SiO2 with KAlSi3O8) — igneous

Quartz Pebble (with Feldspar/Mica)

Granitic Quartz / SiO2 with KAlSi3O8

Rock Fragment with Calcite/Quartz Vein (Polymictic Rock Fragment (SiO2 / CaCO3)) — igneous

Rock Fragment with Calcite/Quartz Vein

Polymictic Rock Fragment (SiO2 / CaCO3)

Sunstone (Plagioclase Feldspar (Na,Ca)(Si,Al)3O8) — mineral

Sunstone

Plagioclase Feldspar (Na,Ca)(Si,Al)3O8

Chalcedony / Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Chalcedony / Quartz Pebble

Silicon Dioxide (SiO2)

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

Jasper pebble

Silicon Dioxide (SiO2) with iron oxide impurities

Raw Sunstone (Sunstone (Feldspar variety, (Ca,Na)((Al,Si)2Si2O8))) — mineral

Raw Sunstone

Sunstone (Feldspar variety, (Ca,Na)((Al,Si)2Si2O8))

Clear Quartz (Rock Crystal) (Silicon Dioxide (SiO2)) — mineral

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Citrine (Silicon Dioxide (SiO2) with ferric iron impurities) — gemstone

Citrine

Silicon Dioxide (SiO2) with ferric iron impurities

Fossilized Coral (Petrified Coral) (Lithostrotionella (example genus) / Scleractinia) — fossil

Fossilized Coral (Petrified Coral)

Lithostrotionella (example genus) / Scleractinia

Amazonite (K(AlSi3O8)) — mineral

Amazonite

K(AlSi3O8)

Moonstone (Feldspar) (Orthoclase Feldspar KAlSi3O8 / Albite NaAlSi3O8) — gemstone

Moonstone (Feldspar)

Orthoclase Feldspar KAlSi3O8 / Albite NaAlSi3O8

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Lake Superior Agate (Silicon dioxide (SiO2) - variety of Chalcedony) — mineral

Lake Superior Agate

Silicon dioxide (SiO2) - variety of Chalcedony

Snakeskin Agate (Microcrystalline Quartz (SiO2) with chalcedony inclusions) — sedimentary

Snakeskin Agate

Microcrystalline Quartz (SiO2) with chalcedony inclusions

Yellow Chalcedony (likely Carnelian or Agate) (Silicon dioxide (SiO2)) — mineral

Yellow Chalcedony (likely Carnelian or Agate)

Silicon dioxide (SiO2)

Imperial Topaz (Al2SiO4(F,OH)2) — mineral

Imperial Topaz

Al2SiO4(F,OH)2

Petrified Wood (Silicified wood (primarily SiO2)) — fossil

Petrified Wood

Silicified wood (primarily SiO2)