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

Gneiss (High-grade Metamorphic Gneiss) — metamorphic

Gneiss

High-grade Metamorphic Gneiss

Anyolite (Ruby in Zoisite) (Zoisite with inclusions of Hornblende and Ruby (Ca2Al3(SiO4)3(OH))) — metamorphic

Anyolite (Ruby in Zoisite)

Zoisite with inclusions of Hornblende and Ruby (Ca2Al3(SiO4)3(OH))

Quartz (Smoky Quartz variant) (Silicon Dioxide (SiO2)) — mineral

Quartz (Smoky Quartz variant)

Silicon Dioxide (SiO2)

Quartz (Quartzite or Quartz Pebble) (Silicon Dioxide (SiO2)) — metamorphic

Quartz (Quartzite or Quartz Pebble)

Silicon Dioxide (SiO2)

Fossiliferous Limestone (Biogenic Limestone (Calcium Carbonate, CaCO3)) — sedimentary

Fossiliferous Limestone

Biogenic Limestone (Calcium Carbonate, CaCO3)

Eclogite with Garnet (Eclogite (Omphacite-Garnet Metamorphic Rock)) — metamorphic

Eclogite with Garnet

Eclogite (Omphacite-Garnet Metamorphic Rock)

Clear Quartz Crystal (Silicon dioxide (SiO2)) — mineral

Clear Quartz Crystal

Silicon dioxide (SiO2)

Smoky Quartz with Hematite inclusions (Silicon Dioxide (SiO2) with Fe2O3 inclusions) — mineral

Smoky Quartz with Hematite inclusions

Silicon Dioxide (SiO2) with Fe2O3 inclusions

Gold Ore (Native Gold (Au) in Matrix) — mineral

Gold Ore

Native Gold (Au) in Matrix

Fossilized bivalve shell in limestone (Calcitic fossil shell; likely an oyster or other rudist/bivalve (Bivalvia), preserved in carbonate rock) — fossil

Fossilized bivalve shell in limestone

Calcitic fossil shell; likely an oyster or other rudist/bivalve (Bivalvia), preserved in carbonate rock

Fossilized Gastropod Internal Mold (Gastropoda (Steinkern fossil)) — fossil

Fossilized Gastropod Internal Mold

Gastropoda (Steinkern fossil)

Jasper with Quartz Veining (Silicon Dioxide (SiO2) with Hematite impurities) — sedimentary

Jasper with Quartz Veining

Silicon Dioxide (SiO2) with Hematite impurities

Hematite (Iron(III) oxide (Fe2O3)) — mineral

Hematite

Iron(III) oxide (Fe2O3)

Sandstone (Ferruginous) (Sandstone (primarily SiO2 with iron oxide Fe2O3 staining)) — sedimentary

Sandstone (Ferruginous)

Sandstone (primarily SiO2 with iron oxide Fe2O3 staining)

Quartzite (Iron-stained) (Metamorphic Quartzite (primarily SiO2) with Limonite/Hematite staining) — metamorphic

Quartzite (Iron-stained)

Metamorphic Quartzite (primarily SiO2) with Limonite/Hematite staining

Quartzite Pebble (Metamorphosed Quartz Sandstone (SiO2)) — metamorphic

Quartzite Pebble

Metamorphosed Quartz Sandstone (SiO2)

Jasper with Iron Oxides (Silicon Dioxide (SiO2) with Fe2O3 inclusions) — sedimentary

Jasper with Iron Oxides

Silicon Dioxide (SiO2) with Fe2O3 inclusions

Hag Stone (Chert/Flint with natural perforation) (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Hag Stone (Chert/Flint with natural perforation)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Amethyst Gemstone (Crystalline Quartz (SiO2 with iron impurities)) — gemstone

Amethyst Gemstone

Crystalline Quartz (SiO2 with iron impurities)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

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

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Limestone (Sedimentary Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Sedimentary Calcium Carbonate (CaCO3)

Quartzite River Rock (Quartzite (primarily SiO2)) — metamorphic

Quartzite River Rock

Quartzite (primarily SiO2)

Quartz (Smoky or Clear variety with inclusions) (Silicon Dioxide (SiO2)) — mineral

Quartz (Smoky or Clear variety with inclusions)

Silicon Dioxide (SiO2)

Siltstone with Iron Staining (Siltstone) — sedimentary

Siltstone with Iron Staining

Siltstone

Shale (with minor calcite veining) (Clastic sedimentary rock (primarily clay minerals and quartz)) — sedimentary

Shale (with minor calcite veining)

Clastic sedimentary rock (primarily clay minerals and quartz)

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

Quartz (River Pebble)

Silicon Dioxide (SiO2)

Sandstone (Ferruginous) (Arenite with Iron Oxide cement (SiO2 + Fe2O3)) — sedimentary

Sandstone (Ferruginous)

Arenite with Iron Oxide cement (SiO2 + Fe2O3)

Sandstone (with potential Quartzite characteristics) (Clastic sedimentary rock (primarily SiO2)) — sedimentary

Sandstone (with potential Quartzite characteristics)

Clastic sedimentary rock (primarily SiO2)

Blue mineral specimen, likely bornite (“peacock ore”) (Bornite, Cu5FeS4, possibly iridescent chalcopyrite (CuFeS2)) — mineral

Blue mineral specimen, likely bornite (“peacock ore”)

Bornite, Cu5FeS4, possibly iridescent chalcopyrite (CuFeS2)

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

Agate (Carnelian / Chalcedony pebble)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

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

Quartz (River Pebble)

Silicon Dioxide (SiO2)

Quartzite Pebble (Quartzite (SiO2)) — metamorphic

Quartzite Pebble

Quartzite (SiO2)

Sandstone Pebbles (Arenite) — sedimentary

Sandstone Pebbles

Arenite

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

Milky Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

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

Chert (Arrowhead Artifact)

Microcrystalline Quartz (SiO2)

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

Milky Quartz Pebble

Silicon Dioxide (SiO2)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Chert Arrowhead (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert Arrowhead

Cryptocrystalline Quartz (SiO2)

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

Chert Arrowhead (Lithic Artifact)

Microcrystalline Quartz (SiO2)

Granite Pebble (Granite) — igneous

Granite Pebble

Granite

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

Tumbled Quartz Pebble

Silicon Dioxide (SiO2)