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

Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

Dyed Blue Agate (Silicon Dioxide (SiO2)) — Mineral

Dyed Blue Agate

Silicon Dioxide (SiO2)

Quartz (Silicon dioxide (SiO2)) — mineral

Quartz

Silicon dioxide (SiO2)

Ocean Jasper (Orbicular Jasper / Silicate) — Mineral

Ocean Jasper

Orbicular Jasper / Silicate

Chert / Flint (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert / Flint

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Agate Geode with Quartz (Silicon Dioxide (SiO2)) — mineral

Agate Geode with Quartz

Silicon Dioxide (SiO2)

Feldspar (specifically Orthoclase or Plagioclase) (Potassium Aluminum Silicate (KAlSi3O8) or Sodium/Calcium Aluminum Silicate) — mineral

Feldspar (specifically Orthoclase or Plagioclase)

Potassium Aluminum Silicate (KAlSi3O8) or Sodium/Calcium Aluminum Silicate

Limestone pebble (Sedimentary rock composed mainly of calcium carbonate (CaCO3)) — sedimentary

Limestone pebble

Sedimentary rock composed mainly of calcium carbonate (CaCO3)

River Pebble (Lithified rock fragment (variable composition)) — sedimentary

River Pebble

Lithified rock fragment (variable composition)

Quartz (Jasper / Chert) (Silicon Dioxide (SiO2)) — sedimentary

Quartz (Jasper / Chert)

Silicon Dioxide (SiO2)

Quartz pebble (Agate / Chalcedony) (Silicon Dioxide (SiO2)) — mineral

Quartz pebble (Agate / Chalcedony)

Silicon Dioxide (SiO2)

Chalcedony Pebble (Silicon Dioxide (SiO2)) — mineral

Chalcedony Pebble

Silicon Dioxide (SiO2)

Chert Pebble (Water-worn Siliceous Pebble) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert Pebble (Water-worn Siliceous Pebble)

Microcrystalline Quartz (SiO2)

Orange Aventurine (Quartz (SiO2) with Hematite or Goethite inclusions) — mineral

Orange Aventurine

Quartz (SiO2) with Hematite or Goethite inclusions

Quartzite with Mica / Gneiss Pebble (Metamorphic Rock (Quartz-Feldspar-Mica aggregate)) — metamorphic

Quartzite with Mica / Gneiss Pebble

Metamorphic Rock (Quartz-Feldspar-Mica aggregate)

Granite Pebble with Quartz Vein (Granite (Plutonic Igneous Rock) with Quartz (SiO2)) — igneous

Granite Pebble with Quartz Vein

Granite (Plutonic Igneous Rock) with Quartz (SiO2)

Red Tiger's Eye (Silicified Crocidolite (SiO2 with iron oxide inclusions)) — mineral

Red Tiger's Eye

Silicified Crocidolite (SiO2 with iron oxide inclusions)

Quartzite pebble (Quartzite (SiO2)) — metamorphic

Quartzite pebble

Quartzite (SiO2)

Banded Agate (Silicon Dioxide (SiO2) - Chalcedony) — mineral

Banded Agate

Silicon Dioxide (SiO2) - Chalcedony

Red Jasper (SiO2 (Microcrystalline Quartz)) — sedimentary

Red Jasper

SiO2 (Microcrystalline Quartz)

Mica Schist (Schist) — metamorphic

Mica Schist

Schist

Red and White Quartzite (Metamorphic Quartz Sandstone (SiO2)) — metamorphic

Red and White Quartzite

Metamorphic Quartz Sandstone (SiO2)

Megalodon Shark Tooth (Otodus megalodon) — fossil

Megalodon Shark Tooth

Otodus megalodon

Quartzite (Metamorphic Quartzite (SiO2)) — metamorphic

Quartzite

Metamorphic Quartzite (SiO2)

Schist (Metamorphic Schist) — metamorphic

Schist

Metamorphic Schist

Quartzite (Metamorphic Quartzite) — metamorphic

Quartzite

Metamorphic Quartzite

Chrysocolla (Hydrated copper phyllosilicate, (Cu,Al)2H2Si2O5(OH)4·nH2O) — mineral

Chrysocolla

Hydrated copper phyllosilicate, (Cu,Al)2H2Si2O5(OH)4·nH2O

Sandstone (Sedimentary Clastic Rock (Quartz Arenite)) — sedimentary

Sandstone

Sedimentary Clastic Rock (Quartz Arenite)

Carnelian and Strawberry Quartz (Silicon Dioxide (SiO2) with Hematite and Limonite inclusions) — mineral

Carnelian and Strawberry Quartz

Silicon Dioxide (SiO2) with Hematite and Limonite inclusions

Black Onyx and Mother of Pearl (Cryptocrystalline Quartz (SiO2) and Nacre (Calcium Carbonate)) — mineral

Black Onyx and Mother of Pearl

Cryptocrystalline Quartz (SiO2) and Nacre (Calcium Carbonate)

Black Obsidian (Obsidian (Volcanic Glass)) — igneous

Black Obsidian

Obsidian (Volcanic Glass)

Siltstone (Siltstone (Detrital Sedimentary Rock)) — sedimentary

Siltstone

Siltstone (Detrital Sedimentary Rock)

Porphyry (Porphyritic Basalt or Andesite) — igneous

Porphyry

Porphyritic Basalt or Andesite

Sandstone (Ferruginous) (Arenite with Iron-Oxide Cement) — sedimentary

Sandstone (Ferruginous)

Arenite with Iron-Oxide Cement

Chert (Jasper/Carnelian variety) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper/Carnelian variety)

Microcrystalline Quartz (SiO2)

Banded Chert (Silicon Dioxide (SiO2) with impurities) — sedimentary

Banded Chert

Silicon Dioxide (SiO2) with impurities

Yellow Quartzite (River Pebble) (Quartzite (primarily SiO2)) — metamorphic

Yellow Quartzite (River Pebble)

Quartzite (primarily SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Chert (or Limestone) (Sedimentary Cryptocrystalline Quartz (SiO2) or Calcium Carbonate (CaCO3)) — sedimentary

Chert (or Limestone)

Sedimentary Cryptocrystalline Quartz (SiO2) or Calcium Carbonate (CaCO3)

Agate (Chalcedony (SiO2) with impurities) — sedimentary

Agate

Chalcedony (SiO2) with impurities

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

Vesicular Rhyolite

Rhyolite (High-silica volcanic rock)

Labradorite (Polished Sphere) (Labradorite ((Ca, Na)(Al, Si)4O8)) — mineral

Labradorite (Polished Sphere)

Labradorite ((Ca, Na)(Al, Si)4O8)