Rock Identifier

Category

Mineral (Tectosilicate)

Browse mineral (tectosilicate) specimens identified by the Rock Identifier community.

Gold Ore (Gold-bearing Quartz (Native Gold, Au)) — mineral

Gold Ore

Gold-bearing Quartz (Native Gold, Au)

Emerald (Beryl (Be3Al2(SiO3)6) with Chromium and/or Vanadium impurities) — mineral

Emerald

Beryl (Be3Al2(SiO3)6) with Chromium and/or Vanadium impurities

Zoisite with Ruby (Anyolite) (Anyolite (Ca2Al3(SiO4)3(OH) + (Hb, Al, Cr)2O3)) — metamorphic

Zoisite with Ruby (Anyolite)

Anyolite (Ca2Al3(SiO4)3(OH) + (Hb, Al, Cr)2O3)

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

Amethyst (Polished Cabochon)

Silicon Dioxide (SiO2) with iron impurities

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

Amethyst

Amethyst (Silicon Dioxide - SiO2 with iron impurities)

Dendritic Agate (Silicon Dioxide (SiO2) with inclusions) — mineral

Dendritic Agate

Silicon Dioxide (SiO2) with inclusions

Paraiba Tourmaline (Elbaite Tourmaline (Na(Li,Al)3Al6(BO3)3Si6O18(OH)4) - Copper-bearing) — mineral

Paraiba Tourmaline

Elbaite Tourmaline (Na(Li,Al)3Al6(BO3)3Si6O18(OH)4) - Copper-bearing

Amazonite (Amazonite (KAlSi3O8, a variety of Microcline)) — mineral

Amazonite

Amazonite (KAlSi3O8, a variety of Microcline)

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

Amethyst Quartz

Amethyst (Silicon Dioxide, SiO2)

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Amazonite (K(AlSi3O8), Microcline) — mineral

Amazonite

K(AlSi3O8), Microcline

Amethyst (Pale/Light Variety) (Quartz (Silicon Dioxide) with Iron impurities - SiO2) — mineral

Amethyst (Pale/Light Variety)

Quartz (Silicon Dioxide) with Iron impurities - SiO2

Chrysocolla in Matrix (Chrysocolla (Cu,Al)2H2Si2O5(OH)4·nH2O) — mineral

Chrysocolla in Matrix

Chrysocolla (Cu,Al)2H2Si2O5(OH)4·nH2O

Herkimer Diamond (Quartz Crystal) (Silicon Dioxide (SiO2)) — mineral

Herkimer Diamond (Quartz Crystal)

Silicon Dioxide (SiO2)

Caribbean Calcite (Calcium Carbonate with Aragonite (CaCO3)) — mineral

Caribbean Calcite

Calcium Carbonate with Aragonite (CaCO3)

Yellow Calcite (Calcite (Calcium Carbonate, CaCO3)) — mineral

Yellow Calcite

Calcite (Calcium Carbonate, CaCO3)

Amethyst (Crystalline Quartz (SiO2 with iron impurities)) — mineral

Amethyst

Crystalline Quartz (SiO2 with iron impurities)

Petrified Wood (Silicified Wood (SiO2)) — mineral

Petrified Wood

Silicified Wood (SiO2)

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

Amethyst (Rough Quartz)

Silicon Dioxide (SiO2) with iron impurities

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

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Schist (Mica Schist) — metamorphic

Schist

Mica Schist

Sandstone (Calcareous or Ferruginous) (Clastic sedimentary rock (SiO2 with CaCO3 or Fe2O3 cement)) — sedimentary

Sandstone (Calcareous or Ferruginous)

Clastic sedimentary rock (SiO2 with CaCO3 or Fe2O3 cement)

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

Prehnite

Prehnite - Ca2Al(AlSi3O10)(OH)2

Chrysocolla (with Quartz and Azurite) (Hydrated copper phyllosilicate mineral [Cu2-xAlx(H2-xSi2O5)(OH)4·n(H2O)]) — mineral

Chrysocolla (with Quartz and Azurite)

Hydrated copper phyllosilicate mineral [Cu2-xAlx(H2-xSi2O5)(OH)4·n(H2O)]

Yellow Quartz (Citrine or Quartzite Pebble) (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz (Citrine or Quartzite Pebble)

Silicon Dioxide (SiO2)

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Sandstone (with garnet granules) (Clastic sedimentary rock (primarily SiO2 with Fe3Al2(SiO4)3 inclusions)) — sedimentary

Sandstone (with garnet granules)

Clastic sedimentary rock (primarily SiO2 with Fe3Al2(SiO4)3 inclusions)

Gneiss (Gneiss (High-grade Metamorphic Rock)) — metamorphic

Gneiss

Gneiss (High-grade Metamorphic Rock)

Blue Goldstone (Aventurine Glass) — Man-made mineral simulant (Glass)

Blue Goldstone

Aventurine Glass

Man-made mineral simulant (Glass)

Carnelian (Carnelian (SiO2)) — mineral

Carnelian

Carnelian (SiO2)

Mica-rich Schist fragment (Mica Schist) — metamorphic

Mica-rich Schist fragment

Mica Schist

Green Garden Quartz (Phantom Quartz) (Silicon Dioxide (SiO2) with Chlorite inclusions) — mineral

Green Garden Quartz (Phantom Quartz)

Silicon Dioxide (SiO2) with Chlorite inclusions

Tiger's Eye (Pseudomorph of Quartz after Crocidolite (SiO2)) — mineral

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Marble (Recrystallized Calcite (CaCO3) or Dolomite (CaMg(CO3)2)) — metamorphic

Marble

Recrystallized Calcite (CaCO3) or Dolomite (CaMg(CO3)2)

Celadonite in Basalt (Green Earth) (Celadonite (K(Mg,Fe2+)(Fe3+,Al)Si4O10(OH)2)) — mineral

Celadonite in Basalt (Green Earth)

Celadonite (K(Mg,Fe2+)(Fe3+,Al)Si4O10(OH)2)

Granite (Granite (composed primarily of Quartz SiO2, Feldspar (KAlSi3O8), and Mica)) — igneous

Granite

Granite (composed primarily of Quartz SiO2, Feldspar (KAlSi3O8), and Mica)

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

Milky Quartz with inclusions

Silicon Dioxide (SiO2)

Fossilized Shark Tooth (Carcharodon carcharias (fossilized) / Hydroxyapatite permineralized with silica or iron) — sedimentary

Fossilized Shark Tooth

Carcharodon carcharias (fossilized) / Hydroxyapatite permineralized with silica or iron

Sandstone (Ferruginous) (Clastic sedimentary rock (primarily SiO2 with Fe2O3 cement)) — sedimentary

Sandstone (Ferruginous)

Clastic sedimentary rock (primarily SiO2 with Fe2O3 cement)

Red Sandstone (Arenite (with Iron Oxide)) — sedimentary

Red Sandstone

Arenite (with Iron Oxide)

Red Sandstone (Arenite (with Iron Oxide / Hematite cementation)) — sedimentary

Red Sandstone

Arenite (with Iron Oxide / Hematite cementation)