Rock Identifier

Category

Crystal

Browse crystal specimens identified by the Rock Identifier community.

Amazonite (Amazonite (KAlSi3O8)) — mineral

Amazonite

Amazonite (KAlSi3O8)

mineral
Citrine (Silicon Dioxide (SiO2)) — mineral

Citrine

Silicon Dioxide (SiO2)

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

Smoky Quartz (with Hematite inclusions)

Silicon Dioxide (SiO2)

mineral
Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

mineral
Calcite (Calcium Carbonate (CaCO3)) — mineral

Calcite

Calcium Carbonate (CaCO3)

mineral
Quartz (Iron-stained) (Silicon Dioxide (SiO2)) — mineral

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

mineral
Halite (Halite (Sodium Chloride, NaCl)) — mineral

Halite

Halite (Sodium Chloride, NaCl)

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

Milky Quartz

Quartz (Silica / Silicon Dioxide, SiO2)

mineral
Black Tourmaline (Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)) — mineral

Black Tourmaline

Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)

mineral
Schorl (Black Tourmaline) (NaFe3Al6Si6O18(BO3)3(OH)3OH (Iron tourmaline)) — mineral

Schorl (Black Tourmaline)

NaFe3Al6Si6O18(BO3)3(OH)3OH (Iron tourmaline)

mineral
Pyrite in Shale (Iron Disulfide (FeS2) in Argillaceous Shale) — sedimentary

Pyrite in Shale

Iron Disulfide (FeS2) in Argillaceous Shale

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

Clear Quartz

Silicon Dioxide (SiO2)

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

Quartz (Milky/Rose variety)

Silicon Dioxide (SiO2)

mineral
Amazonite (Potassium feldspar (Microcline) - K(AlSi3O8)) — mineral

Amazonite

Potassium feldspar (Microcline) - K(AlSi3O8)

mineral
Quartz (Milky Quartz / Greenish Quartz) (SiO2 (Silicon Dioxide)) — mineral

Quartz (Milky Quartz / Greenish Quartz)

SiO2 (Silicon Dioxide)

mineral
Yellow Quartzite (Tumbled) (Quartzite (SiO2)) — metamorphic

Yellow Quartzite (Tumbled)

Quartzite (SiO2)

metamorphic
Amazonite (Tumbled Chips) (Potassium Feldspar (KAlSi3O8)) — mineral

Amazonite (Tumbled Chips)

Potassium Feldspar (KAlSi3O8)

mineral
Azurite (Azurite (Cu3(CO3)2(OH)2)) — mineral

Azurite

Azurite (Cu3(CO3)2(OH)2)

mineral
Almandine Garnet (Almandite (Fe3Al2(SiO4)3)) — Mineral

Almandine Garnet

Almandite (Fe3Al2(SiO4)3)

Mineral
Biotite Schist (Biotite Mica Schist [K(Mg,Fe)3AlSi3O10(OH,F)2]) — metamorphic

Biotite Schist

Biotite Mica Schist [K(Mg,Fe)3AlSi3O10(OH,F)2]

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

Amethyst

Silicon Dioxide (SiO2) with Iron impurities

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

Amethyst (Quartz)

Silicon Dioxide (SiO2)

mineral
Quartz (Milky or Cloudy Quartz) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky or Cloudy Quartz)

Silicon Dioxide (SiO2)

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

Alexandrite in Matrix

Chrysoberyl (BeAl2O4 with Chromium impurities)

mineral
Amazonite (Potassium Aluminum Silicate (KAlSi3O8)) — mineral

Amazonite

Potassium Aluminum Silicate (KAlSi3O8)

mineral
Yellow Quartz (Citrine or Iron-Stained Quartz) (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz (Citrine or Iron-Stained Quartz)

Silicon Dioxide (SiO2)

mineral
Celestite (Celestine) (Strontium sulfate (SrSO4)) — mineral

Celestite (Celestine)

Strontium sulfate (SrSO4)

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

Quartz (Milky Quartz)

Silicon Dioxide (SiO₂)

mineral
Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

mineral
Orange Quartz (Citrine or Iron-stained Quartz) (Silicon Dioxide (SiO2)) — mineral

Orange Quartz (Citrine or Iron-stained Quartz)

Silicon Dioxide (SiO2)

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

Hematite

Iron(III) oxide (Fe2O3)

mineral
Fluorite (Rainbow Fluorite Point) (Calcium Fluoride (CaF2)) — mineral

Fluorite (Rainbow Fluorite Point)

Calcium Fluoride (CaF2)

mineral
Raw Citrine (Yellow Quartz) (Citrine / Silicon Dioxide (SiO2)) — mineral

Raw Citrine (Yellow Quartz)

Citrine / Silicon Dioxide (SiO2)

mineral
Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

sedimentary
Rhodochrosite (Manganese Carbonate (MnCO3)) — mineral

Rhodochrosite

Manganese Carbonate (MnCO3)

mineral
Epidote (Epidote Group (e.g., Clinozoisite, Epidote, Piemontite), Epidote formula: Ca2(Al,Fe)3(SiO4)3(OH)) — Mineral

Epidote

Epidote Group (e.g., Clinozoisite, Epidote, Piemontite), Epidote formula: Ca2(Al,Fe)3(SiO4)3(OH)

Mineral
Herkimer Diamond (Double-Terminated Quartz (SiO2)) — mineral

Herkimer Diamond

Double-Terminated Quartz (SiO2)

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

Quartz (Milky/Crystalline variety)

Silicon Dioxide (SiO2)

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

Clear Quartz

Silicon Dioxide (SiO2)

mineral
Prehnite (Prehnite (Ca2Al(AlSi3O10)(OH)2)) — mineral

Prehnite

Prehnite (Ca2Al(AlSi3O10)(OH)2)

mineral
Bornite (Bornite (Cu5FeS4)) — mineral

Bornite

Bornite (Cu5FeS4)

mineral
Green Fluorite (Fluorite (Calcium Fluoride - CaF2)) — mineral

Green Fluorite

Fluorite (Calcium Fluoride - CaF2)

mineral