Rock Identifier

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Mineralogical Specimen

Browse mineralogical specimen specimens identified by the Rock Identifier community.

Learn about Mineralogical Specimen in the encyclopedia

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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

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

Quartz (Chalcedony)

Silicon Dioxide (SiO2)

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

Quartz Pebble

Silicon Dioxide (SiO2)

mineral
Rhyolite (Rhyolite) — igneous

Rhyolite

Rhyolite

igneous
Quartzite River Rock (Quartzite (primarily SiO2)) — metamorphic

Quartzite River Rock

Quartzite (primarily SiO2)

metamorphic
Granite Pebble (Granite (Phaneritic intrusive igneous rock)) — igneous

Granite Pebble

Granite (Phaneritic intrusive igneous rock)

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

Chert (Jasper variety)

Microcrystalline Quartz (SiO2)

sedimentary
Chert (often called Flint or River Pebble) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (often called Flint or River Pebble)

Microcrystalline Quartz (SiO2)

sedimentary
Obsidian (Obsidian (Volcanic Glass, SiO2 + oxide impurities)) — igneous

Obsidian

Obsidian (Volcanic Glass, SiO2 + oxide impurities)

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

Chert (River Pebble)

Microcrystalline Quartz (SiO2)

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

Quartz Pebble

Silicon Dioxide (SiO2)

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

Yellow Quartz Pebble

Silicon Dioxide (SiO2)

mineral
Limestone (Pebble) (Calcium Carbonate (CaCO3)) — sedimentary

Limestone (Pebble)

Calcium Carbonate (CaCO3)

sedimentary
Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

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

Milky Quartz Pebble

Silicon Dioxide (SiO2)

mineral
Chert (Field Stone) (Chert (Silicon Dioxide, SiO2)) — sedimentary

Chert (Field Stone)

Chert (Silicon Dioxide, SiO2)

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

Milky Quartz Pebble

Silicon Dioxide (SiO2)

mineral
Limestone Pebble (Limestone (Calcium Carbonate - CaCO3)) — sedimentary

Limestone Pebble

Limestone (Calcium Carbonate - CaCO3)

sedimentary
Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

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

Quartz Pebble

Silicon Dioxide (SiO2)

mineral
Granite (Phaneritic Igneous Rock (primarily Quartz, Feldspar, and Mica)) — igneous

Granite

Phaneritic Igneous Rock (primarily Quartz, Feldspar, and Mica)

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

Quartz Pebble

Silicon Dioxide (SiO2)

mineral
Quartzite (River Cobble) (Metamorphic Quartz-rich Rock) — metamorphic

Quartzite (River Cobble)

Metamorphic Quartz-rich Rock

metamorphic
Chert (Nodule) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Nodule)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

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

Milky Quartz Pebble

Silicon Dioxide (SiO2)

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

Chert (Nodule)

SiO2 (Microcrystalline Quartz)

sedimentary
Diabase (also known as Dolerite) (Diabase) — igneous

Diabase (also known as Dolerite)

Diabase

igneous
Quartzite Pebble (Quartzite (SiO2 with minor impurities)) — metamorphic

Quartzite Pebble

Quartzite (SiO2 with minor impurities)

metamorphic
Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

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

Chert (River Pebble)

Microcrystalline Quartz (SiO2)

sedimentary
Banded Jasper with Hematite or Quartz (Silicon Dioxide (SiO2) with impurities) — sedimentary

Banded Jasper with Hematite or Quartz

Silicon Dioxide (SiO2) with impurities

sedimentary
Limestone (specifically Marl or Chalk) (Calcium Carbonate (CaCO3)) — sedimentary

Limestone (specifically Marl or Chalk)

Calcium Carbonate (CaCO3)

sedimentary
Chalcedony (Agate/Carnelian type) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Agate/Carnelian type)

Silicon Dioxide (SiO2)

mineral
Granite (Phaneritic Felsic Intrusive Igneous Rock) — igneous

Granite

Phaneritic Felsic Intrusive Igneous Rock

igneous
Sandstone (Arenite (SiO2 principal)) — sedimentary

Sandstone

Arenite (SiO2 principal)

sedimentary
Chalcedony (Agate Nodules) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Agate Nodules)

Silicon Dioxide (SiO2)

mineral
Nephrite Jade (Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)) — metamorphic

Nephrite Jade

Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)

metamorphic
Conglomerate (Conglomerate (clastic sedimentary rock)) — sedimentary

Conglomerate

Conglomerate (clastic sedimentary rock)

sedimentary
Granite (Phaneritic Felsic Igneous Rock) — igneous

Granite

Phaneritic Felsic Igneous Rock

igneous
Quartzite Cobble (Quartzite (mostly SiO2)) — metamorphic

Quartzite Cobble

Quartzite (mostly SiO2)

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

Quartz Pebble

Silicon Dioxide (SiO2)

mineral
Quartz Pebble (Silicon dioxide (SiO2)) — mineral

Quartz Pebble

Silicon dioxide (SiO2)

mineral
Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

sedimentary