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

K-Feldspar / Granite Pegmatite (Potassium Feldspar (Microcline/Orthoclase) with Quartz) — igneous

K-Feldspar / Granite Pegmatite

Potassium Feldspar (Microcline/Orthoclase) with Quartz

Gossan / Iron-Rich Weathered Rock (Hydrated Iron Oxides / Limonite / Goethite) — mineral

Gossan / Iron-Rich Weathered Rock

Hydrated Iron Oxides / Limonite / Goethite

Quartz Vein Rock (Silicon Dioxide (SiO2)) — mineral

Quartz Vein Rock

Silicon Dioxide (SiO2)

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

White Quartz Pebble

Silicon Dioxide (SiO2)

Scoria (Vesicular Mafic Igneous Rock) — igneous

Scoria

Vesicular Mafic Igneous Rock

River Stone (Green Quartzite) (Quartzite (Metamorphosed Sandstone)) — metamorphic

River Stone (Green Quartzite)

Quartzite (Metamorphosed Sandstone)

Granite (Intrusive Igneous Rock) — igneous

Granite

Intrusive Igneous Rock

Pink Granite (Felsic Intrusive Igneous Rock) — igneous

Pink Granite

Felsic Intrusive Igneous Rock

Pink Granite / K-Feldspar (Alkali feldspar granite / Potassium feldspar (Microcline/Orthoclase)) — igneous

Pink Granite / K-Feldspar

Alkali feldspar granite / Potassium feldspar (Microcline/Orthoclase)

Basalt Pebble (Extrusive igneous rock (Mafic)) — igneous

Basalt Pebble

Extrusive igneous rock (Mafic)

Granite Pebble (Intrusive Igneous Rock) — igneous

Granite Pebble

Intrusive Igneous Rock

Limestone (Calcareous sedimentary rock (CaCO3)) — sedimentary

Limestone

Calcareous sedimentary rock (CaCO3)

Quartzite (Metamorphic Quartzite (SiO2)) — metamorphic

Quartzite

Metamorphic Quartzite (SiO2)

Yellow Quartzite (Silicon Dioxide (SiO2)) — metamorphic

Yellow Quartzite

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Dyed Fuchsia Tiger’s Eye (Pseudomorph of Quartz after Crocidolite (SiO2)) — metamorphic

Dyed Fuchsia Tiger’s Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Dyed Agate (Silicon Dioxide (SiO2) - Chalcedony variety) — sedimentary

Dyed Agate

Silicon Dioxide (SiO2) - Chalcedony variety

Schist (Mica Schist) — metamorphic

Schist

Mica Schist

Sandstone (Limonitic/Arkose) (Sandstone (primarily SiO2 with FeO(OH)·nH2O)) — sedimentary

Sandstone (Limonitic/Arkose)

Sandstone (primarily SiO2 with FeO(OH)·nH2O)

Jasper (Silicon Dioxide (SiO2) with impurities) — sedimentary

Jasper

Silicon Dioxide (SiO2) with impurities

Quartz with Iron Staining (Silicon Dioxide (SiO2) with Fe2O3 (Hematite/Limonite) inclusions) — mineral

Quartz with Iron Staining

Silicon Dioxide (SiO2) with Fe2O3 (Hematite/Limonite) inclusions

Chert (Jasper/Flint variety) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Jasper/Flint variety)

Silicon Dioxide (SiO2)

Limestone with Fossil Fragments (Bioclastic Limestone (CaCO3)) — sedimentary

Limestone with Fossil Fragments

Bioclastic Limestone (CaCO3)

Chert (Chert (SiO2)) — sedimentary

Chert

Chert (SiO2)

Druzy Quartz on Matrix (Silicon Dioxide (SiO2) on host rock) — mineral

Druzy Quartz on Matrix

Silicon Dioxide (SiO2) on host rock

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

Sandstone (Ferruginous)

Arenite with Iron-Oxide Cement

Quartzite (SiO2 (Silicon Dioxide)) — metamorphic

Quartzite

SiO2 (Silicon Dioxide)

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

Chert (Flint/Jasper variety)

Microcrystalline Quartz (SiO2)

Red Sandstone (Ferruginous Sandstone (SiO2 dominated with Fe2O3)) — sedimentary

Red Sandstone

Ferruginous Sandstone (SiO2 dominated with Fe2O3)

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

Milky Quartz

Crystalline Silicon Dioxide (SiO2)

Satin Spar Selenite (Gypsum (CaSO4·2H2O)) — mineral

Satin Spar Selenite

Gypsum (CaSO4·2H2O)

Carnelian Agate (Silicon Dioxide (SiO2)) — mineral

Carnelian Agate

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Sardonyx or Carnelian Agate (Silicon Dioxide (SiO2) with iron impurities) — mineral

Sardonyx or Carnelian Agate

Silicon Dioxide (SiO2) with iron impurities

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Chert

Microcrystalline Quartz (SiO2)

Quartz Crystal Cluster (Silicon Dioxide (SiO2)) — mineral

Quartz Crystal Cluster

Silicon Dioxide (SiO2)

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

Pyritic Quartzite

Metequartzite with FeS2 (Pyrite) inclusions

Basalt with Sulfide/Pyrite inclusion (Aphanitic Mafic Igneous Rock (likely Basalt) with Pyrite (FeS2)) — igneous

Basalt with Sulfide/Pyrite inclusion

Aphanitic Mafic Igneous Rock (likely Basalt) with Pyrite (FeS2)

Pink Quartzite (Quartzite (SiO2 with iron oxide impurities)) — metamorphic

Pink Quartzite

Quartzite (SiO2 with iron oxide impurities)

Clear Quartz (Rock Crystal) (Silicon Dioxide (SiO2)) — mineral

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)