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

Mushroom Tourmaline

Mushroom Tourmaline

Aquamarine Crystal

Aquamarine Crystal

White Beryl

White Beryl

Smoky Quartz

Smoky Quartz

Clear Obsidian

Clear Obsidian

Goshenite Crystal

Goshenite Crystal

Magnetite

Magnetite

Crocoite

Crocoite

Basalt (River Pebble) (Extrusive mafic igneous rock) — igneous

Basalt (River Pebble)

Extrusive mafic igneous rock

Chert (Field Stone) (Chert (SiO2)) — sedimentary

Chert (Field Stone)

Chert (SiO2)

Quartz (Microcrystalline/Chert) (Silicon Dioxide (SiO2)) — mineral

Quartz (Microcrystalline/Chert)

Silicon Dioxide (SiO2)

Rainbow Hematite Ring (Iron(III) oxide (Fe2O3) with thin-film coating) — mineral

Rainbow Hematite Ring

Iron(III) oxide (Fe2O3) with thin-film coating

Basalt (with possible Calcite/Quartz veining) (Afanitic Mafic Igneous Rock) — igneous

Basalt (with possible Calcite/Quartz veining)

Afanitic Mafic Igneous Rock

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

Milky Quartz Pebble

Silicon Dioxide (SiO2)

Yellow Chert or Jasper (Microcrystalline Quartz (SiO2) with iron oxide inclusions) — sedimentary

Yellow Chert or Jasper

Microcrystalline Quartz (SiO2) with iron oxide inclusions

Granite or Granodiorite (Weathered) (Granite) — Igneous

Granite or Granodiorite (Weathered)

Granite

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

Quartz (Sand Grain size)

Silicon Dioxide (SiO2)

Quartzite Pebble (Quartzite (mostly SiO2)) — metamorphic

Quartzite Pebble

Quartzite (mostly SiO2)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Limestone (River Stone) (Calcite-rich Sedimentary Rock (CaCO3)) — sedimentary

Limestone (River Stone)

Calcite-rich Sedimentary Rock (CaCO3)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Basalt Pebble (Basalt) — igneous

Basalt Pebble

Basalt

Quartzite (Quartzite (SiO2 silicon dioxide)) — metamorphic

Quartzite

Quartzite (SiO2 silicon dioxide)

Granite Cobble (Granite (Felsic intrusive igneous rock)) — igneous

Granite Cobble

Granite (Felsic intrusive igneous rock)

Diorite (Pebble) (Diorite) — igneous

Diorite (Pebble)

Diorite

Quartzite (River Stone) (Quartzite (SiO2)) — metamorphic

Quartzite (River Stone)

Quartzite (SiO2)

White Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

White Quartz Pebble

Silicon Dioxide (SiO2)

Quartzite Pebble (Quartzite) — metamorphic

Quartzite Pebble

Quartzite

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Conglomerate (Conglomerate (clastic sedimentary rock)) — sedimentary

Conglomerate

Conglomerate (clastic sedimentary rock)

Rhyolite (Rhyolite (High-silica volcanic rock)) — igneous

Rhyolite

Rhyolite (High-silica volcanic rock)

Milky Quartz with Iron Staining (Quartz (Silicon Dioxide, SiO2)) — mineral

Milky Quartz with Iron Staining

Quartz (Silicon Dioxide, SiO2)

Chert Arrowhead (Projectile Point) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert Arrowhead (Projectile Point)

Microcrystalline Quartz (SiO2)

Sandstone (Quartzite Pebble) (Arenite (SiO2)) — sedimentary

Sandstone (Quartzite Pebble)

Arenite (SiO2)

Basalt Pebble (Extrusive mafic igneous rock) — igneous

Basalt Pebble

Extrusive mafic igneous rock

Quartz (River Cobble) (Silicon Dioxide (SiO2)) — mineral

Quartz (River Cobble)

Silicon Dioxide (SiO2)

Quartz Geode (Silicon Dioxide (SiO2)) — mineral

Quartz Geode

Silicon Dioxide (SiO2)

Gray Chert (River Pebble) (Microcrystalline Quartz (SiO2)) — sedimentary

Gray Chert (River Pebble)

Microcrystalline Quartz (SiO2)

Quartzite (River Pebble) (Metamorphosed Quartz Sandstone (SiO2)) — metamorphic

Quartzite (River Pebble)

Metamorphosed Quartz Sandstone (SiO2)

Chert (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert

Cryptocrystalline Quartz (SiO2)

Pink Granite (Water-worn Pebble) (Felsic Intrusive Igneous Rock (Granite)) — igneous

Pink Granite (Water-worn Pebble)

Felsic Intrusive Igneous Rock (Granite)

Quartzite Pebble (Metamorphic Quartz (SiO2)) — metamorphic

Quartzite Pebble

Metamorphic Quartz (SiO2)

Chert (Ventifact) (Chert (Silicon Dioxide, SiO2)) — sedimentary

Chert (Ventifact)

Chert (Silicon Dioxide, SiO2)

Granite Pebble (Felsic Intrusive Igneous Rock (composed of Quartz, Feldspar, and Mica)) — igneous

Granite Pebble

Felsic Intrusive Igneous Rock (composed of Quartz, Feldspar, and Mica)

Chert (Jasper) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper)

Microcrystalline Quartz (SiO2)

Silver (Native Element) (Ag (Native Silver), with minor Copper (Cu)) — mineral

Silver (Native Element)

Ag (Native Silver), with minor Copper (Cu)

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

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Smoky Quartz (Quartz (Silicon Dioxide) - SiO2) — mineral

Smoky Quartz

Quartz (Silicon Dioxide) - SiO2

Granite (Weathered) (Phaneritic Felsic Igneous Rock) — Igneous

Granite (Weathered)

Phaneritic Felsic Igneous Rock

Quartzite Cobble (Quartzite (composed primarily of SiO2)) — metamorphic

Quartzite Cobble

Quartzite (composed primarily of SiO2)