Rock Identifier

Category

Mineralological Specimen

Browse mineralological specimen specimens identified by the Rock Identifier community.

Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

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

Clear Quartz Crystal

Silicon Dioxide (SiO2)

Green Calcite (Calcium Carbonate (CaCO3)) — mineral

Green Calcite

Calcium Carbonate (CaCO3)

Quartzite (Yellow/Iron-Stained) (Quartzite (SiO2 with Iron Oxide impurities)) — metamorphic

Quartzite (Yellow/Iron-Stained)

Quartzite (SiO2 with Iron Oxide impurities)

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

White Quartz Pebble

Silicon Dioxide (SiO2)

Jasper with Quartz inclusions (Silicon Dioxide (SiO2) - Microcrystalline Chalcedony) — sedimentary

Jasper with Quartz inclusions

Silicon Dioxide (SiO2) - Microcrystalline Chalcedony

Pyrite (Fool's Gold) (Iron Disulfide (FeS2)) — mineral

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Ocean Jasper (Orbicular Jasper) (Silicon Dioxide (SiO2) with iron and magnesium inclusions) — mineral

Ocean Jasper (Orbicular Jasper)

Silicon Dioxide (SiO2) with iron and magnesium inclusions

Labradorite (specifically Larvikite beads) (Plagioclase Feldspar (Na,Ca)(Si,Al)4O8) — igneous

Labradorite (specifically Larvikite beads)

Plagioclase Feldspar (Na,Ca)(Si,Al)4O8

Banded Jasper (Silicon Dioxide (SiO2) with iron oxide inclusions) — sedimentary

Banded Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Red Moss Agate (Jasper) (Silicon Dioxide (SiO2) with Iron Oxide inclusions) — sedimentary

Red Moss Agate (Jasper)

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Cobaltian Calcite (Cobaltoan Calcite) (Cobalt-bearing Calcite (Ca,Co)CO3) — mineral

Cobaltian Calcite (Cobaltoan Calcite)

Cobalt-bearing Calcite (Ca,Co)CO3

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

Quartz

Quartz (Silicon Dioxide, SiO2)

Biotite Schist (Biotite-rich Schist (K(Mg,Fe)3AlSi3O10(F,OH)2)) — metamorphic

Biotite Schist

Biotite-rich Schist (K(Mg,Fe)3AlSi3O10(F,OH)2)

Banded Agate (Carnelian type) (Silicon Dioxide (SiO2) - Cryptocrystalline Chalcedony) — mineral

Banded Agate (Carnelian type)

Silicon Dioxide (SiO2) - Cryptocrystalline Chalcedony

Amazonite (Potassium Feldspar (Microcline) - KAlSi3O8) — mineral

Amazonite

Potassium Feldspar (Microcline) - KAlSi3O8

Erythrite (Erythrite (Cobalt Bloom) - Co3(AsO4)2·8H2O) — mineral

Erythrite

Erythrite (Cobalt Bloom) - Co3(AsO4)2·8H2O

Biotite / Black Mica (Biotite K(Mg,Fe)3AlSi3O10(F,OH)2) — mineral

Biotite / Black Mica

Biotite K(Mg,Fe)3AlSi3O10(F,OH)2

Red Jasper (Jasper (Silicon Dioxide, SiO2 with Iron Oxide impurities)) — sedimentary

Red Jasper

Jasper (Silicon Dioxide, SiO2 with Iron Oxide impurities)

Quartz with Mica (Schist/Pegmatite fragment) (Silicon Dioxide (SiO2) with Phyllosilicates (KAl2(AlSi3O10)(OH)2)) — igneous/metamorphic

Quartz with Mica (Schist/Pegmatite fragment)

Silicon Dioxide (SiO2) with Phyllosilicates (KAl2(AlSi3O10)(OH)2)

igneous/metamorphic

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

Ferruginous Quartz

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Azurite with Malachite and Limonite (Azurite Cu3(CO3)2(OH)2 / Malachite Cu2CO3(OH)2) — mineral

Azurite with Malachite and Limonite

Azurite Cu3(CO3)2(OH)2 / Malachite Cu2CO3(OH)2

Alexandrite in Matrix (Chrysoberyl (BeAl2O4 with Chromium impurities)) — mineral

Alexandrite in Matrix

Chrysoberyl (BeAl2O4 with Chromium impurities)

Granite (Granite (Phaneritic Igneous Rock)) — igneous

Granite

Granite (Phaneritic Igneous Rock)

Chert (or Flint) (Chert (Sedimentary Cryptocrystalline Sio2)) — sedimentary

Chert (or Flint)

Chert (Sedimentary Cryptocrystalline Sio2)

Oolitic Ironstone (Sedimentary Ooidal Ironstone (Limonite/Hematite mixture)) — sedimentary

Oolitic Ironstone

Sedimentary Ooidal Ironstone (Limonite/Hematite mixture)

Clear Quartz (Silicon dioxide (SiO2)) — mineral

Clear Quartz

Silicon dioxide (SiO2)

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

Clear Quartz (Tumbled)

Silicon Dioxide (SiO2)

Red Jasper with Quartz Veining (Silicon Dioxide (SiO2) - Microcrystalline Quartz with Iron Oxide impurities (Hematite)) — sedimentary

Red Jasper with Quartz Veining

Silicon Dioxide (SiO2) - Microcrystalline Quartz with Iron Oxide impurities (Hematite)

Ferruginous Quartz (Quartz (Silicon Dioxide, SiO2) with Iron Oxides) — mineral

Ferruginous Quartz

Quartz (Silicon Dioxide, SiO2) with Iron Oxides

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

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

Amethyst

Silicon dioxide with iron impurities (SiO2)

Tiger Iron (Tiger Iron (composite of Tiger's Eye, Red Jasper, and Hematite)) — metamorphic

Tiger Iron

Tiger Iron (composite of Tiger's Eye, Red Jasper, and Hematite)

Jasper (likely Lake Superior Jasper) (Jasper (Silicon Dioxide, SiO2)) — sedimentary

Jasper (likely Lake Superior Jasper)

Jasper (Silicon Dioxide, SiO2)

Fairy Stone (Staurolite Twin) (Staurolite (Fe,Mg,Zn)2Al9Si4O22(OH)2) — metamorphic

Fairy Stone (Staurolite Twin)

Staurolite (Fe,Mg,Zn)2Al9Si4O22(OH)2

Prehnite (Ca2Al(AlSi3O10)(OH)2 (Calcium Aluminum Silicate hydroxide)) — mineral

Prehnite

Ca2Al(AlSi3O10)(OH)2 (Calcium Aluminum Silicate hydroxide)

Chalcedony (Botryoidal/Drusy Quartz) (Silicon Dioxide (SiO₂)) — Mineral

Chalcedony (Botryoidal/Drusy Quartz)

Silicon Dioxide (SiO₂)

Tree Agate (Silicon Dioxide (SiO2) with Dendritic Inclusions) — Mineral

Tree Agate

Silicon Dioxide (SiO2) with Dendritic Inclusions

Amethyst (Faceted) (Silicon Dioxide with Iron impurities (SiO2)) — mineral

Amethyst (Faceted)

Silicon Dioxide with Iron impurities (SiO2)

Fuchsite on Quartzite (Muscovite (Chromium-bearing) K(Al,Cr)2(AlSi3O10)(OH)2) — metamorphic

Fuchsite on Quartzite

Muscovite (Chromium-bearing) K(Al,Cr)2(AlSi3O10)(OH)2

Pyrite with Calcite (Iron Disulfide (FeS2) with Calcium Carbonate (CaCO3)) — mineral

Pyrite with Calcite

Iron Disulfide (FeS2) with Calcium Carbonate (CaCO3)

Fuchsite (Green Muscovite in Quartz) (Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)) — metamorphic

Fuchsite (Green Muscovite in Quartz)

Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)