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

Quartz with Epidote (Silicon Dioxide (SiO2) with Calcium Aluminum Iron Silicate [Ca2(Al,Fe)3(SiO4)3(OH)]) — metamorphic

Quartz with Epidote

Silicon Dioxide (SiO2) with Calcium Aluminum Iron Silicate [Ca2(Al,Fe)3(SiO4)3(OH)]

Chert (with Desert Varnish/Iron Stain) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (with Desert Varnish/Iron Stain)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Likely basalt or vesicular volcanic rock (Basalt, possibly scoriaceous basalt; exact identification is uncertain from the photograph) — igneous

Likely basalt or vesicular volcanic rock

Basalt, possibly scoriaceous basalt; exact identification is uncertain from the photograph

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

Chalcedony with Druzy Quartz

Silicon Dioxide (SiO2)

Chert (Jasper/Agate variant) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper/Agate variant)

Microcrystalline Quartz (SiO2)

Galena with Pyrite (Lead Sulfide (PbS) associated with Iron Sulfide (FeS2)) — mineral

Galena with Pyrite

Lead Sulfide (PbS) associated with Iron Sulfide (FeS2)

Pyritic Quartzite (Quartzite with Pyrite inclusions (FeS2)) — metamorphic

Pyritic Quartzite

Quartzite with Pyrite inclusions (FeS2)

Native Copper with Malachite/Oxide Coating (Native Copper (Cu)) — mineral

Native Copper with Malachite/Oxide Coating

Native Copper (Cu)

Smoky Quartz (with Druzy/Polished Edge) (Smoky Quartz (Silicon Dioxide, SiO2)) — mineral

Smoky Quartz (with Druzy/Polished Edge)

Smoky Quartz (Silicon Dioxide, SiO2)

Brecciated Chert with Quartz Veining (Microcrystalline Quartz (SiO2) Breccia) — sedimentary

Brecciated Chert with Quartz Veining

Microcrystalline Quartz (SiO2) Breccia

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

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Raw Topaz (or Smoky Quartz) (Al2SiO4(F,OH)2 / Silicon Dioxide (SiO2)) — mineral

Raw Topaz (or Smoky Quartz)

Al2SiO4(F,OH)2 / Silicon Dioxide (SiO2)

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

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

Ferruginous Quartz (Ferruginous Quartz (Silicon Dioxide + Iron Oxide, SiO2 + Fe2O3)) — mineral

Ferruginous Quartz

Ferruginous Quartz (Silicon Dioxide + Iron Oxide, SiO2 + Fe2O3)

Fossiliferous Chert (with Fossil Shells) (Silicon Dioxide (SiO2) with biogenic inclusions) — sedimentary

Fossiliferous Chert (with Fossil Shells)

Silicon Dioxide (SiO2) with biogenic inclusions

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

Quartz (Druzy)

Silicon Dioxide (SiO2)

Quartz (Milky or Iron-stained) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky or Iron-stained)

Silicon Dioxide (SiO2)

Travertine (Tufa) (Chemical Sedimentary Rock / Travertine (CaCO3)) — sedimentary

Travertine (Tufa)

Chemical Sedimentary Rock / Travertine (CaCO3)

Orthoclase (Potassium) Feldspar in Quartz (KAlSi3O8 (Potassium Aluminum Silicate)) — igneous

Orthoclase (Potassium) Feldspar in Quartz

KAlSi3O8 (Potassium Aluminum Silicate)

Amethyst (Amethyst (Silicon Dioxide - SiO2 with impurities of iron)) — mineral

Amethyst

Amethyst (Silicon Dioxide - SiO2 with impurities of iron)

Green Onyx (Agate) (Silicon Dioxide (SiO2)) — sedimentary

Green Onyx (Agate)

Silicon Dioxide (SiO2)

Likely weathered sandstone or iron-stained quartzite fragment (Quartz-rich sandstone (predominantly SiO₂; exact identification uncertain from image)) — sedimentary

Likely weathered sandstone or iron-stained quartzite fragment

Quartz-rich sandstone (predominantly SiO₂; exact identification uncertain from image)

Siltstone Pebble (Siltstone) — sedimentary

Siltstone Pebble

Siltstone

Granite River Pebble (Granite (Phaneritic igneous rock)) — igneous

Granite River Pebble

Granite (Phaneritic igneous rock)

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

Chert (Arrowhead Fragment)

Microcrystalline Quartz (SiO2)

Chert (Chalcedony/Agate Pebble) (Cryptocrystalline Silica (SiO2)) — sedimentary

Chert (Chalcedony/Agate Pebble)

Cryptocrystalline Silica (SiO2)

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

Granite Pebble

Granite (Felsic Plutonic Rock)

Granite (Granite) — Igneous

Granite

Granite

Jasper (Silicon dioxide (SiO2)) — Sedimentary / Mineral

Jasper

Silicon dioxide (SiO2)

Sedimentary / Mineral

N/A - Image does not contain a rock or mineral (Anthropogenic textile material) — Non-geological

N/A - Image does not contain a rock or mineral

Anthropogenic textile material

Jasper (Silicon dioxide, SiO2) — Mineral

Jasper

Silicon dioxide, SiO2

N/A (Non-Geological Object) — N/A

N/A (Non-Geological Object)

Pumice (Pumice (Vesicular Felsic Igneous Rock)) — igneous

Pumice

Pumice (Vesicular Felsic Igneous Rock)

Tumbled Agate (Silicon Dioxide (SiO2)) — sedimentary

Tumbled Agate

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Druzy Quartz (Silicon Dioxide (SiO2)) — mineral

Druzy Quartz

Silicon Dioxide (SiO2)

Vesicular Basalt with Feldspar Phenocrysts (Porphyritic Basalt) — igneous

Vesicular Basalt with Feldspar Phenocrysts

Porphyritic Basalt

Gabbro (Phaneritic mafic intrusive igneous rock) — igneous

Gabbro

Phaneritic mafic intrusive igneous rock

Quartz pebble (Silicon dioxide (SiO2)) — mineral

Quartz pebble

Silicon dioxide (SiO2)

Banded Sandstone / Quartzite Pebble (Sedimentary quartz arenite with liesegang banding) — sedimentary

Banded Sandstone / Quartzite Pebble

Sedimentary quartz arenite with liesegang banding