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

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

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

Quartz (Clear Quartz)

Silicon Dioxide (SiO2)

Carnelian Agate (Silicon Dioxide (SiO2) with iron oxide inclusions) — mineral

Carnelian Agate

Silicon Dioxide (SiO2) with iron oxide inclusions

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

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Quartz (Chert/Quartzite variant) (Silicon Dioxide (SiO2)) — mineral

Quartz (Chert/Quartzite variant)

Silicon Dioxide (SiO2)

Sandstone Pebble (Arenite (SiO2 principal)) — sedimentary

Sandstone Pebble

Arenite (SiO2 principal)

Marine invertebrate fossils (Brachiopods and Gastropods) (Phylum Brachiopoda and Class Gastropoda) — fossil

Marine invertebrate fossils (Brachiopods and Gastropods)

Phylum Brachiopoda and Class Gastropoda

Basalt (Vesicular) (Vesicular Basalt) — igneous

Basalt (Vesicular)

Vesicular Basalt

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

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Obsidian (Volcanic glass) — igneous

Obsidian

Volcanic glass

Green Fluorite (Calcium fluoride (CaF2)) — mineral

Green Fluorite

Calcium fluoride (CaF2)

Raw Fluorite (Calcium Fluoride (CaF2)) — mineral

Raw Fluorite

Calcium Fluoride (CaF2)

Petrified Bone Pebble (Silicified Fossilized Bone) — fossil

Petrified Bone Pebble

Silicified Fossilized Bone

Jasper (Chalcedony (Microcrystalline Quartz) - SiO2) — sedimentary or metamorphic

Jasper

Chalcedony (Microcrystalline Quartz) - SiO2

sedimentary or metamorphic

Red Jasper with Quartz (Microcrystalline Quartz (SiO2) with Hematite inclusions) — sedimentary

Red Jasper with Quartz

Microcrystalline Quartz (SiO2) with Hematite inclusions

Sandstone nugget (Arenite (primarily Quartz SiO2)) — sedimentary

Sandstone nugget

Arenite (primarily Quartz SiO2)

Quartz (Smoky/Clear variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Smoky/Clear variety)

Silicon Dioxide (SiO2)

Banded Agate (specifically Carnelian Agate) (Silicon Dioxide (SiO2)) — mineral

Banded Agate (specifically Carnelian Agate)

Silicon Dioxide (SiO2)

Garnetiferous Pegmatite (Pegmatite with Almandine Garnet and Muscovite) — igneous

Garnetiferous Pegmatite

Pegmatite with Almandine Garnet and Muscovite

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

Granite Pebble

Granite (Phaneritic intrusive igneous rock)

Chalcedony Geode Part (Agate/Quartz) (Silicon Dioxide (SiO2)) — mineral

Chalcedony Geode Part (Agate/Quartz)

Silicon Dioxide (SiO2)

Quartzite with Quartz Vein (Quartzite (SiO2)) — metamorphic

Quartzite with Quartz Vein

Quartzite (SiO2)

Quartz (Milky/Smoky variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky/Smoky variety)

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Quartz (Citrine variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Citrine variety)

Silicon Dioxide (SiO2)

Banded Calcite (Calcium Carbonate (CaCO3)) — mineral

Banded Calcite

Calcium Carbonate (CaCO3)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Jasper (Jasper (Cryptocrystalline variety of Quartz, SiO2)) — sedimentary

Jasper

Jasper (Cryptocrystalline variety of Quartz, SiO2)

Limestone with Calcite Crystals (Sedimentary Rock containing Calcium Carbonate (CaCO3)) — sedimentary

Limestone with Calcite Crystals

Sedimentary Rock containing Calcium Carbonate (CaCO3)

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

Quartz / Rock Crystal

Silicon Dioxide (SiO2)

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

Quartz (Milky/Crystalline)

Quartz (Silicon Dioxide, SiO2)

Greenstone or Epidote-rich rock (Epidote or Chlorite schist/greenstone) — metamorphic

Greenstone or Epidote-rich rock

Epidote or Chlorite schist/greenstone

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

Banded Agate (Chalcedony)

Silicon Dioxide (SiO2)

Yellow Ochre / Limonite (Limonite (inter-mixed iron oxides and hydroxides, primarily FeO(OH)·nH2O)) — mineral

Yellow Ochre / Limonite

Limonite (inter-mixed iron oxides and hydroxides, primarily FeO(OH)·nH2O)

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

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Quartz (Milky/Chalcedony variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky/Chalcedony variety)

Silicon Dioxide (SiO2)

Chalcedony (Botryoidal/Chalcedony Rose) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Botryoidal/Chalcedony Rose)

Silicon Dioxide (SiO2)

Common Opal (Hydrated silica (SiO2 " nH2O)) — mineral

Common Opal

Hydrated silica (SiO2 " nH2O)

Sandstone (likely Ferruginous) (Sandstone (SiO2 with iron oxides)) — sedimentary

Sandstone (likely Ferruginous)

Sandstone (SiO2 with iron oxides)

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

Chert (Jasper variety)

Silicon Dioxide (SiO2)