Rock Identifier

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Mineralogical Specimen

Browse mineralogical specimen specimens identified by the Rock Identifier community.

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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

White Beryl

Smoky Quartz

Smoky Quartz

Clear Obsidian

Clear Obsidian

Goshenite Crystal

Goshenite Crystal

Magnetite

Magnetite

Crocoite

Crocoite

Gneiss (Gneiss (High-grade Metamorphic Rock)) — metamorphic

Gneiss

Gneiss (High-grade Metamorphic Rock)

metamorphic
Granite (Phaneritic Felsic Igneous Rock) — igneous

Granite

Phaneritic Felsic Igneous Rock

igneous
Dyed Agate Slice (Silicon Dioxide (SiO2) - Chalcedony variety) — mineral

Dyed Agate Slice

Silicon Dioxide (SiO2) - Chalcedony variety

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

Quartz (Smoky/Milky)

Silicon Dioxide (SiO2)

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

Milky Quartz Pebble

Silicon Dioxide (SiO2)

mineral
Quartzite Pebble (Metamorphic Quartzite (SiO2)) — metamorphic

Quartzite Pebble

Metamorphic Quartzite (SiO2)

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

Quartz Pebble

Silicon Dioxide (SiO2)

mineral
Quartz with inclusions (SiO2) — mineral

Quartz with inclusions

SiO2

mineral
Quartzite river pebble (Quartzite (SiO2)) — metamorphic

Quartzite river pebble

Quartzite (SiO2)

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

Chert Pebble

Microcrystalline Quartz (SiO2)

sedimentary
Quartzite Pebble (Metamorphic Quartzite (SiO2)) — metamorphic

Quartzite Pebble

Metamorphic Quartzite (SiO2)

metamorphic
Chert (Black Flint) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Black Flint)

Silicon Dioxide (SiO2)

sedimentary
Quartzite River Stone (Quartzite (SiO2 with impurities)) — metamorphic

Quartzite River Stone

Quartzite (SiO2 with impurities)

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

Chert (River Pebble)

Microcrystalline Quartz (SiO2)

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

Milky Quartz

Silicon Dioxide (SiO2)

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

Milky Quartz

Silicon Dioxide (SiO2)

mineral
Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

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

Milky Quartz Pebble

Silicon Dioxide (SiO2)

mineral
Quartzite Pebble (Quartzite (SiO2)) — metamorphic

Quartzite Pebble

Quartzite (SiO2)

metamorphic
Potassium Feldspar (Orthoclase) (Orthoclase (KAlSi3O8)) — mineral

Potassium Feldspar (Orthoclase)

Orthoclase (KAlSi3O8)

mineral
Calcite Rhomb (Calcium Carbonate (CaCO3)) — mineral

Calcite Rhomb

Calcium Carbonate (CaCO3)

mineral
Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

metamorphic
Fire Opal (Hydrated Silica (SiO2·nH2O)) — mineral

Fire Opal

Hydrated Silica (SiO2·nH2O)

mineral
Chalcedony (Yellow Agate/Chert) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Yellow Agate/Chert)

Silicon Dioxide (SiO2)

mineral
Chert (River Pebble) (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (River Pebble)

Cryptocrystalline Quartz (SiO2)

sedimentary
Pink Granite (Granite (Phaneritic igneous rock rich in Alkali Feldspar and Quartz)) — igneous

Pink Granite

Granite (Phaneritic igneous rock rich in Alkali Feldspar and Quartz)

igneous
Smurf Rock (Fictional Interpretation) (Cyanus Anthropomorphicus (Geologic Simulation)) — Artificial/Fantasy Object

Smurf Rock (Fictional Interpretation)

Cyanus Anthropomorphicus (Geologic Simulation)

Artificial/Fantasy Object
Banded Agate (specifically Lace Agate type) (Silicon Dioxide (SiO2)) — mineral

Banded Agate (specifically Lace Agate type)

Silicon Dioxide (SiO2)

mineral
Calcite (Banded Calcite / Onyx Marble) (Calcium Carbonate (CaCO3)) — mineral

Calcite (Banded Calcite / Onyx Marble)

Calcium Carbonate (CaCO3)

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

Quartz Pebble

Silicon Dioxide (SiO2)

mineral
Blue Lace Agate (Silicon Dioxide (SiO2) - Variety of Chalcedony) — mineral

Blue Lace Agate

Silicon Dioxide (SiO2) - Variety of Chalcedony

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

Quartz (Small Pebble)

Silicon Dioxide (SiO2)

mineral
Yellow Calcite (Calcite (Calcium Carbonate, CaCO3)) — mineral

Yellow Calcite

Calcite (Calcium Carbonate, CaCO3)

mineral
Chalcedony Geode Fragment (Silicon Dioxide (SiO2)) — mineral

Chalcedony Geode Fragment

Silicon Dioxide (SiO2)

mineral
Quartzite River Rock (Metaquartzite (majorly SiO2)) — metamorphic

Quartzite River Rock

Metaquartzite (majorly SiO2)

metamorphic
Quartz (Milky or Cloudy) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky or Cloudy)

Silicon Dioxide (SiO2)

mineral
Granite Pebble (Granite (Felsic Plutonic Rock)) — igneous

Granite Pebble

Granite (Felsic Plutonic Rock)

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

Quartz Pebble

Silicon Dioxide (SiO2)

mineral
Quartz with Iron Stains (Silicon Dioxide (SiO2) with FeOx inclusions) — mineral

Quartz with Iron Stains

Silicon Dioxide (SiO2) with FeOx inclusions

mineral
Chert (Yellow Jasper/River Pebble) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Yellow Jasper/River Pebble)

Microcrystalline Quartz (SiO2)

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

Chert Arrowhead

Microcrystalline Quartz (SiO2)

sedimentary
Fossiliferous Limestone (Fossiliferous Limestone (CaCO3)) — sedimentary

Fossiliferous Limestone

Fossiliferous Limestone (CaCO3)

sedimentary