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

Tumbled Agate (Silicon Dioxide (Quartz variety: Chalcedony)) — gemstone

Tumbled Agate

Silicon Dioxide (Quartz variety: Chalcedony)

Quartzite Pebble (Metamorphic Quartzite) — metamorphic

Quartzite Pebble

Metamorphic Quartzite

Quartzite with Quartz Veins (Metamorphic Quartzite (SiO2)) — metamorphic

Quartzite with Quartz Veins

Metamorphic Quartzite (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Milky Quartz with Mica (Silicon Dioxide (SiO2) with Muscovite or Biotite inclusions) — mineral

Milky Quartz with Mica

Silicon Dioxide (SiO2) with Muscovite or Biotite inclusions

Weathered Sandstone / Quartzite (Quartz Arenite) — sedimentary

Weathered Sandstone / Quartzite

Quartz Arenite

Quartzite Pebble (Metamorphic Quartz Sandstone (SiO2)) — metamorphic

Quartzite Pebble

Metamorphic Quartz Sandstone (SiO2)

Tumbled Peach Quartz (Silicon Dioxide (SiO2)) — mineral

Tumbled Peach Quartz

Silicon Dioxide (SiO2)

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

Quartz Crystal Cluster

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Tumbled Rose Quartz (Silicon Dioxide (SiO2)) — mineral

Tumbled Rose Quartz

Silicon Dioxide (SiO2)

Quartzite (Metamorphic Quartzite) — metamorphic

Quartzite

Metamorphic Quartzite

Tumbled Amethyst (Silicon Dioxide (SiO2)) — mineral

Tumbled Amethyst

Silicon Dioxide (SiO2)

Quartz pebble (Silicon dioxide (SiO2)) — sedimentary

Quartz pebble

Silicon dioxide (SiO2)

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

Tumbled Agate

Silicon Dioxide (Chalcedony variety), SiO2

Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Chert

Microcrystalline Quartz (SiO2)

Argillite (Argillite (Fine-grained sedimentary rock composed mostly of clay-sized particles)) — sedimentary

Argillite

Argillite (Fine-grained sedimentary rock composed mostly of clay-sized particles)

Rhyolite with Lithophysae and Iron Oxide (Extrusive igneous rock / Felsic volcanic rock) — igneous

Rhyolite with Lithophysae and Iron Oxide

Extrusive igneous rock / Felsic volcanic rock

Muscovite Mica (KAl2(AlSi3O10)(OH)2) — mineral

Muscovite Mica

KAl2(AlSi3O10)(OH)2

Blue Agate (Dyed or Treated Chalcedony) (Silicon Dioxide (SiO2), microcrystalline quartz variety) — mineral

Blue Agate (Dyed or Treated Chalcedony)

Silicon Dioxide (SiO2), microcrystalline quartz variety

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

Dragon Vein Agate (Dyed/Fractured Quartz)

Silicon dioxide (SiO2)

Yellow Quartz (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz

Silicon Dioxide (SiO2)

Quartzite Pebble (Microcrystalline Quartz / Chert) (Silicon Dioxide (SiO2)) — sedimentary

Quartzite Pebble (Microcrystalline Quartz / Chert)

Silicon Dioxide (SiO2)

Chert (Flint pebble) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Flint pebble)

Microcrystalline Quartz (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Granite Nodule (Granite (felsic intrusive igneous rock composed mainly of quartz, K-feldspar, and plagioclase)) — igneous

Granite Nodule

Granite (felsic intrusive igneous rock composed mainly of quartz, K-feldspar, and plagioclase)

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

Amethyst Cluster

Silicon Dioxide (SiO2) with iron impurities

Magnetite or Ironstone Nodule (Magnetite (Fe3O4) or Hematite-rich Sedimentary Nodule) — mineral

Magnetite or Ironstone Nodule

Magnetite (Fe3O4) or Hematite-rich Sedimentary Nodule

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

Amethyst Geode

Silicon Dioxide (SiO2) with iron impurities

Sandstone (Sandstone (SiO2 dominated)) — sedimentary

Sandstone

Sandstone (SiO2 dominated)

Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Chert

Microcrystalline Quartz (SiO2)

Quartzite (Metamorphosed Quartz Sandstone (SiO2)) — metamorphic

Quartzite

Metamorphosed Quartz Sandstone (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Conglomerate (Polymictic Conglomerate) — sedimentary

Conglomerate

Polymictic Conglomerate

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Basalt (Basalt) — igneous

Basalt

Basalt

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

Chert (Nodule)

Microcrystalline Quartz (SiO2)

Gabbro (Gabbro) — igneous

Gabbro

Gabbro

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Agate (Carnelian / Chalcedony) (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — mineral

Agate (Carnelian / Chalcedony)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Mica Schist (Mica Schist) — metamorphic

Mica Schist

Mica Schist