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

Banded Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Banded Chert

Microcrystalline Quartz (SiO2)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Granodiorite (Granodiorite (containing Plagioclase, Quartz, and Biotite/Amphibole)) — igneous

Granodiorite

Granodiorite (containing Plagioclase, Quartz, and Biotite/Amphibole)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

River Cobble (Quartzite or Sandstone) (Arenite or Meta-quartzite (SiO2 composition)) — sedimentary

River Cobble (Quartzite or Sandstone)

Arenite or Meta-quartzite (SiO2 composition)

Chert (Iron-stained) (Silicon Dioxide (SiO2) with Iron Oxides) — sedimentary

Chert (Iron-stained)

Silicon Dioxide (SiO2) with Iron Oxides

Sandstone (Arenite (SiO2 based)) — sedimentary

Sandstone

Arenite (SiO2 based)

Garnet-Bearing Gneiss (Garnetiferous Feldspathic Gneiss) — metamorphic

Garnet-Bearing Gneiss

Garnetiferous Feldspathic Gneiss

Quartzite cobble (Quartzite (SiO2)) — metamorphic

Quartzite cobble

Quartzite (SiO2)

Mica Schist (Mica-rich Schist containing Muscovite and Quartz) — metamorphic

Mica Schist

Mica-rich Schist containing Muscovite and Quartz

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

Chalcedony (Carnelian)

Silicon Dioxide (SiO2)

Quartz Vein in Metamorphic Rock (Quartzite or Schist host with Quartz (SiO2) intrusion) — metamorphic

Quartz Vein in Metamorphic Rock

Quartzite or Schist host with Quartz (SiO2) intrusion

Chert (Yellow Jasper) (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Yellow Jasper)

Cryptocrystalline Quartz (SiO2)

Quartzite with Chlorite and Iron Staining (Quartzite (SiO2) with Chlorite (Mg,Fe)3(Si,Al)4O10(OH)2) — metamorphic

Quartzite with Chlorite and Iron Staining

Quartzite (SiO2) with Chlorite (Mg,Fe)3(Si,Al)4O10(OH)2

Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Chert

Microcrystalline Quartz (SiO2)

Amethyst on Agate (Crystalline Quartz (SiO2) with trace Iron (Fe3+)) — mineral

Amethyst on Agate

Crystalline Quartz (SiO2) with trace Iron (Fe3+)

Basalt with Plagioclase Phenocrysts (Basalt) — igneous

Basalt with Plagioclase Phenocrysts

Basalt

Granite with Quartz Vein (Granite) — Igneous

Granite with Quartz Vein

Granite

Ferruginous Quartz (Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions) — mineral

Ferruginous Quartz

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions

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

Chert (Jasper/Agate variety)

Microcrystalline Quartz (SiO2)

Sandstone (likely Ferruginous) (Arenite (SiO2 with iron oxide impurities)) — sedimentary

Sandstone (likely Ferruginous)

Arenite (SiO2 with iron oxide impurities)

Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2) — mineral

Lepidolite

K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2

Orange Calcite with Siderite/Iron Oxide Coating (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite with Siderite/Iron Oxide Coating

Calcium Carbonate (CaCO3)

Slate (Foliated metamorphic rock) — metamorphic

Slate

Foliated metamorphic rock

Slag (Industrial Byproduct) (Artificial silicate/iron byproduct) — Mineral description (Anthropogenic material)

Slag (Industrial Byproduct)

Artificial silicate/iron byproduct

Mineral description (Anthropogenic material)

Coquina / Fossiliferous Limestone (Fossiliferous Limestone (CaCO3)) — Sedimentary

Coquina / Fossiliferous Limestone

Fossiliferous Limestone (CaCO3)

Cloudy Quartz (Silicon Dioxide (SiO2)) — mineral

Cloudy Quartz

Silicon Dioxide (SiO2)

Granodiorite (Granodiorite) — Igneous

Granodiorite

Granodiorite

Basalt (Aphanitic Mafic Igneous Rock) — igneous

Basalt

Aphanitic Mafic Igneous Rock

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

Jasper (Cream/Yellow variety)

Silicon Dioxide (SiO2) with impurities

Brown Chalcedony (Agate/Jasper) (Cryptocrystalline Quartz (SiO2)) — mineral

Brown Chalcedony (Agate/Jasper)

Cryptocrystalline Quartz (SiO2)

Yellow Quartz (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz

Silicon Dioxide (SiO2)

Blue Apatite (Calcium Fluorophosphate (Ca5(PO4)3F)) — mineral

Blue Apatite

Calcium Fluorophosphate (Ca5(PO4)3F)

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

Chert (River Pebble)

Microcrystalline Quartz (SiO2)

Paper (Cellulose) (Cellulose (C6H10O5)n) — Organic (Anthropogenic)

Paper (Cellulose)

Cellulose (C6H10O5)n

Organic (Anthropogenic)

Dyed Agate (Chalcedony (SiO2)) — Mineral

Dyed Agate

Chalcedony (SiO2)

Banded Chert in Matrix (Microcrystalline Quartz (SiO2)) — sedimentary

Banded Chert in Matrix

Microcrystalline Quartz (SiO2)

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

Citrine Quartz

Silicon Dioxide (SiO2) with iron impurities

Jasper (Silicon dioxide (Microcrystalline Quartz, SiO2)) — sedimentary

Jasper

Silicon dioxide (Microcrystalline Quartz, SiO2)

Blue Chalcedony (Silicon Dioxide (SiO2)) — mineral

Blue Chalcedony

Silicon Dioxide (SiO2)

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

Chalcedony (Common Agate pebble)

Silicon Dioxide (SiO2)

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

Quartz (Smoky or Impure Variety)

Silicon Dioxide (SiO2)