Rock Identifier

Category

Mineral, Often Found In Metamorphic Rocks But Also In Sedimentary And Igneous Rocks

Browse mineral, often found in metamorphic rocks but also in sedimentary and igneous rocks specimens identified by the Rock Identifier community.

Smoky Quartz (Silicon Dioxide (SiO2) with aluminum impurities) — mineral

Smoky Quartz

Silicon Dioxide (SiO2) with aluminum impurities

Gneiss (Gneiss (High-grade metamorphic rock)) — metamorphic

Gneiss

Gneiss (High-grade metamorphic rock)

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

Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Epidote in Matrix (Epidote; Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)) — metamorphic

Epidote in Matrix

Epidote; Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)

Aquamarine (Rough) (Beryl (Be3Al2Si6O18)) — mineral

Aquamarine (Rough)

Beryl (Be3Al2Si6O18)

Bronzite (MgSiO3 (Enstatite with 10-30% FeSiO3 in solid solution)) — Mineral

Bronzite

MgSiO3 (Enstatite with 10-30% FeSiO3 in solid solution)

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

Quartz Crystal Point

Silicon Dioxide (SiO2)

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

Hematite

Iron(III) oxide (Fe2O3)

Green Fluorite (Calcium Fluoride (CaF2)) — mineral

Green Fluorite

Calcium Fluoride (CaF2)

Moonstone (specifically White Moonstone/Adularia) (Potassium aluminum silicate ((K,Na)AlSi3O8)) — mineral

Moonstone (specifically White Moonstone/Adularia)

Potassium aluminum silicate ((K,Na)AlSi3O8)

Green Calcite (Calcite (CaCO3)) — mineral

Green Calcite

Calcite (CaCO3)

Ruby (Corundum) (Aluminum Oxide (Al2O3) with Chromium traces) — mineral

Ruby (Corundum)

Aluminum Oxide (Al2O3) with Chromium traces

Gemstones (Emerald and Yellow Topaz or Citrine) (Beryl (Be3Al2Si6O18) and Quartz (SiO2) or Topaz (Al2SiO4(F,OH)2)) — mineral

Gemstones (Emerald and Yellow Topaz or Citrine)

Beryl (Be3Al2Si6O18) and Quartz (SiO2) or Topaz (Al2SiO4(F,OH)2)

Banded Gneiss (Gneiss (Metamorphic Rock)) — metamorphic

Banded Gneiss

Gneiss (Metamorphic Rock)

Gneiss (Gneiss (High-grade regional metamorphic rock)) — metamorphic

Gneiss

Gneiss (High-grade regional metamorphic rock)

Sodalite (Na8(Al6Si6O24)Cl2 (Sodalite)) — mineral

Sodalite

Na8(Al6Si6O24)Cl2 (Sodalite)

Red Garnet (Pyrope-Almandine series (Mg3Al2(SiO4)3 to Fe3Al2(SiO4)3)) — mineral

Red Garnet

Pyrope-Almandine series (Mg3Al2(SiO4)3 to Fe3Al2(SiO4)3)

Gneiss (High-grade regional metamorphic rock (Foliated)) — metamorphic

Gneiss

High-grade regional metamorphic rock (Foliated)

Mica (specimen appears to be Muscovite or Phlogopite) (Phyllosilicate mineral; Muscovite: KAl2(AlSi3O10)(F,OH)2) — Mineral (Found in Igneous and Metamorphic rocks)

Mica (specimen appears to be Muscovite or Phlogopite)

Phyllosilicate mineral; Muscovite: KAl2(AlSi3O10)(F,OH)2

Mineral (Found in Igneous and Metamorphic rocks)

Rough Quartz (or Quartzite pebble) (Silicon Dioxide (SiO2)) — mineral

Rough Quartz (or Quartzite pebble)

Silicon Dioxide (SiO2)

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

Banded Chalcedony (Agate)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

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

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

White Quartz (Quartz (SiO2)) — Mineral

White Quartz

Quartz (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

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

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Basalt (Porphyritic) (Basalt (Mafic Extrusive Igneous Rock)) — igneous

Basalt (Porphyritic)

Basalt (Mafic Extrusive Igneous Rock)

Banded Gneiss (Gneiss) — Metamorphic

Banded Gneiss

Gneiss

Blue Chalcedony (Chalcedony (Silicon Dioxide, SiO2)) — mineral

Blue Chalcedony

Chalcedony (Silicon Dioxide, SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Magnetite (Magnetite (Fe3O4)) — mineral

Magnetite

Magnetite (Fe3O4)

Hypersthene (Hypersthene ((Mg,Fe)SiO3)) — mineral

Hypersthene

Hypersthene ((Mg,Fe)SiO3)

River Pebble (Gneiss or Quartzite mixture) (Metamorphic rock (Commonly Gneissic)) — metamorphic

River Pebble (Gneiss or Quartzite mixture)

Metamorphic rock (Commonly Gneissic)

Green Tourmaline (Verdelite) (Tourmaline Group; often Elbaite (Na(Li,Al)3Al6(BO3)3Si6O18(OH)4) or Dravite (NaMg3Al6(BO3)3Si6O18(OH)4)) — Mineral

Green Tourmaline (Verdelite)

Tourmaline Group; often Elbaite (Na(Li,Al)3Al6(BO3)3Si6O18(OH)4) or Dravite (NaMg3Al6(BO3)3Si6O18(OH)4)

Quartz (likely a clear or rock crystal variety) (Quartz (SiO2 - Silicon Dioxide)) — Mineral

Quartz (likely a clear or rock crystal variety)

Quartz (SiO2 - Silicon Dioxide)

Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Rutilated Quartz (Quartz (SiO2) with Rutile (TiO2) inclusions) — Mineral

Rutilated Quartz

Quartz (SiO2) with Rutile (TiO2) inclusions

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Yellow Quartz (Citrine or Yellow Chalcedony) (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz (Citrine or Yellow Chalcedony)

Silicon Dioxide (SiO2)

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

Banded Agate (Yellow Agate)

Silicon Dioxide (SiO2)

Aquamarine (Beryl (Be3Al2Si6O18)) — mineral

Aquamarine

Beryl (Be3Al2Si6O18)

Blue Chalcedony (Microcrystalline Quartz (SiO2)) — mineral

Blue Chalcedony

Microcrystalline Quartz (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)