Rock Identifier

Category

Mineralological Specimen

Browse mineralological specimen specimens identified by the Rock Identifier community.

Learn about Mineralological 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

Smoky Quartz

Clear Obsidian

Goshenite Crystal

Goshenite Crystal

Magnetite

Crocoite

Elbaite

Chalcedony (Common Agate pebble) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Common Agate pebble)

Silicon Dioxide (SiO2)

Blue Lace Agate (Polished Point) (Silicon Dioxide (SiO2)) — mineral

Blue Lace Agate (Polished Point)

Silicon Dioxide (SiO2)

Green Fluorite (Calcium fluoride (CaF2)) — mineral

Green Fluorite

Calcium fluoride (CaF2)

Silver (Native Silver/Alloy Specimen) (Ag (Native Silver element), specifically a 90% Ag / 10% Cu alloy) — mineral

Silver (Native Silver/Alloy Specimen)

Ag (Native Silver element), specifically a 90% Ag / 10% Cu alloy

Weathered quartz-rich rock, possibly granite or quartzite (Indeterminate; likely quartz–feldspar aggregate, possibly granitic gneiss) — igneous

Weathered quartz-rich rock, possibly granite or quartzite

Indeterminate; likely quartz–feldspar aggregate, possibly granitic gneiss

Jasper (Cream/Yellow variety) (Silicon Dioxide (SiO2) with impurities) — sedimentary

Jasper (Cream/Yellow variety)

Silicon Dioxide (SiO2) with impurities

Red Agate (Chalcedony (SiO2)) — gemstone

Red Agate

Chalcedony (SiO2)

Quartz Geode (Silicon Dioxide (SiO2)) — mineral

Quartz Geode

Silicon Dioxide (SiO2)

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

Rough Amethyst

Silicon Dioxide (SiO2) with iron impurities

Pink Granite (Phaneritic Felsic Igneous Rock) — igneous

Pink Granite

Phaneritic Felsic Igneous Rock

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

Amethyst (Raw Cluster)

Silicon Dioxide with iron impurities (SiO2)

Quartz (Smoky or Impure Variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Smoky or Impure Variety)

Silicon Dioxide (SiO2)

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

Citrine Quartz

Silicon Dioxide (SiO2) with iron impurities

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

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Chert with Druzy Quartz Geode (Microcrystalline Quartz (SiO2)) — sedimentary

Chert with Druzy Quartz Geode

Microcrystalline Quartz (SiO2)

Basalt (Extrusive igneous rock) — igneous

Basalt

Extrusive igneous rock

Basalt (Mafic extrusive igneous rock) — igneous

Basalt

Mafic extrusive igneous rock

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)

Green Calcite or Prasiolite (Green Quartz) (Calcium carbonate (CaCO3) or Silicon dioxide (SiO2)) — mineral

Green Calcite or Prasiolite (Green Quartz)

Calcium carbonate (CaCO3) or Silicon dioxide (SiO2)

Quartz Vug / Druzy Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz Vug / Druzy Quartz

Silicon Dioxide (SiO2)

Tumbled Agate (Silicon Dioxide (SiO2)) — mineral

Tumbled Agate

Silicon Dioxide (SiO2)

Basalt (Mafic extrusive igneous rock) — igneous

Basalt

Mafic extrusive igneous rock

Tumbled Quartz (Silicon Dioxide (SiO2)) — mineral

Tumbled Quartz

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