Rock Identifier

Category

Metamorphic And Mineral

Browse metamorphic and mineral specimens identified by the Rock Identifier community.

Agate (Silicon Dioxide (SiO2)) — mineral

Agate

Silicon Dioxide (SiO2)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Agate (Geode nodule) (Cryptocrystalline Quartz (SiO2)) — mineral

Agate (Geode nodule)

Cryptocrystalline Quartz (SiO2)

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

Ruby

Corundum (Al2O3) with Chromium traces

White Jade (Nephrite or Jadeite) (Tremolite-Actinolite series (Nephrite) or NaAlSi2O6 (Jadeite)) — metamorphic

White Jade (Nephrite or Jadeite)

Tremolite-Actinolite series (Nephrite) or NaAlSi2O6 (Jadeite)

White Marble (Recrystallized Calcite (CaCO3)) — metamorphic

White Marble

Recrystallized Calcite (CaCO3)

Schist (Micaceous Schist) (Mica Schist) — metamorphic

Schist (Micaceous Schist)

Mica Schist

Mixed Gemstone Bracelet (Mixed natural minerals and rocks (e.g., Rhodonite, Malachite, Sodalite, Rose Quartz, Black Tourmaline, Quartz/Chalcedony variants)) — Mineral/Rock assemblage

Mixed Gemstone Bracelet

Mixed natural minerals and rocks (e.g., Rhodonite, Malachite, Sodalite, Rose Quartz, Black Tourmaline, Quartz/Chalcedony variants)

Mineral/Rock assemblage

Pyrite (Iron Disulfide (FeS2)) — mineral

Pyrite

Iron Disulfide (FeS2)

Green Aventurine (Fuchsite-bearing Quartz) (Silicon Dioxide with Chromium-rich Muscovite (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)) — metamorphic

Green Aventurine (Fuchsite-bearing Quartz)

Silicon Dioxide with Chromium-rich Muscovite (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)

Yellow Aventurine (or Citrine-colored Quartz) (Silicon Dioxide (SiO2) with inclusions) — metamorphic

Yellow Aventurine (or Citrine-colored Quartz)

Silicon Dioxide (SiO2) with inclusions

Amazonite (Microcline (KAlSi3O8) with lead inclusions) — mineral

Amazonite

Microcline (KAlSi3O8) with lead inclusions

Yellow Calcite (Calcium Carbonate (CaCO3)) — mineral

Yellow Calcite

Calcium Carbonate (CaCO3)

Quartzite with inclusions (Quartzite) — metamorphic

Quartzite with inclusions

Quartzite

Quartz Vein in Host Rock (Hydrothermal Quartz (SiO2) in Slates/Schists) — metamorphic

Quartz Vein in Host Rock

Hydrothermal Quartz (SiO2) in Slates/Schists

White Marble (Recrystallized Calcite (CaCO3)) — metamorphic

White Marble

Recrystallized Calcite (CaCO3)

Mica Schist (Crystalline Schist (often primarily Muscovite or Biotite sheet silicates)) — metamorphic

Mica Schist

Crystalline Schist (often primarily Muscovite or Biotite sheet silicates)

Banded Gneiss (Gneiss (High-grade metamorphic rock typically composed of Quartz, Feldspar, and Biotite/Amphiboles)) — metamorphic

Banded Gneiss

Gneiss (High-grade metamorphic rock typically composed of Quartz, Feldspar, and Biotite/Amphiboles)

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

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

Ferruginous Quartz Cobble

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Garnet-Bearing Gneiss (Almandine-Garnet Gneiss) — metamorphic

Garnet-Bearing Gneiss

Almandine-Garnet Gneiss

Green Aventurine (Silicon Dioxide (SiO2) with Fuchsite inclusions) — metamorphic

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

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

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

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

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

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

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Fluorite-Gedrite in Quartz (Schist) (Fluorite (CaF2) with Gedrite in Quartz/Feldspar Matrix) — metamorphic

Fluorite-Gedrite in Quartz (Schist)

Fluorite (CaF2) with Gedrite in Quartz/Feldspar Matrix

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

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

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

Tiger's Eye

SiO2 (Pseudomorph of Quartz after Crocidolite)

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Tiger's Eye (Blue/Golden mix) (Pseudomorph of Quartz after Crocidolite (SiO2)) — metamorphic

Tiger's Eye (Blue/Golden mix)

Pseudomorph of Quartz after Crocidolite (SiO2)

Gneiss (specifically Banded Gneiss) (Gneiss) — metamorphic

Gneiss (specifically Banded Gneiss)

Gneiss

Mica Schist (Mica Schist (primarily Muscovite or Biotite KAl2(AlSi3O10)(OH)2)) — metamorphic

Mica Schist

Mica Schist (primarily Muscovite or Biotite KAl2(AlSi3O10)(OH)2)

Jade (Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2) or Jadeite (NaAlSi2O6)) — metamorphic

Jade

Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2) or Jadeite (NaAlSi2O6)

Grey Slate (Foliated Metamorphic Rock (formed by low-grade regional metamorphism of shale or mudstone)) — metamorphic

Grey Slate

Foliated Metamorphic Rock (formed by low-grade regional metamorphism of shale or mudstone)

Green Aventurine (Silicon Dioxide (SiO2) with Fuchsite inclusions) — Metamorphic Rock (variety of Quartz)

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

Metamorphic Rock (variety of Quartz)

Quartz Veined Rock (Likely Graywacke or Quartzite) (Silicon Dioxide (SiO2) veins in Metasedimentary matrix) — metamorphic

Quartz Veined Rock (Likely Graywacke or Quartzite)

Silicon Dioxide (SiO2) veins in Metasedimentary matrix

Black Sapphire (Corundum (Al2O3 with iron and titanium impurities)) — mineral

Black Sapphire

Corundum (Al2O3 with iron and titanium impurities)

Garnet (Almandine/Pyrope variety) (Silicate mineral group; typically Fe3Al2(SiO4)3 (Almandine) or Mg3Al2(SiO4)3 (Pyrope)) — mineral

Garnet (Almandine/Pyrope variety)

Silicate mineral group; typically Fe3Al2(SiO4)3 (Almandine) or Mg3Al2(SiO4)3 (Pyrope)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Blue Apatite (Apatite group (Ca5(PO4)3(F,Cl,OH))) — mineral

Blue Apatite

Apatite group (Ca5(PO4)3(F,Cl,OH))

Jadeite (Jade) (Jadeite, NaAlSi2O6) — metamorphic

Jadeite (Jade)

Jadeite, NaAlSi2O6