Rock Identifier

Category

Mineral And Metamorphic Rock

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

Learn about Mineral And Metamorphic Rock in the encyclopedia

Rock Salt

Calc-Silicate Rock

Calc-Silicate Rock

Talc-carbonate Rock

Talc-carbonate Rock

Eulysite

Hornfels

Metabasalt

Halite

Metagabbro

Metarhyolite

Cordierite Hornfels

Cordierite Hornfels

Dolomite

Gypsum

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

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

Schist (Biotite Schist)

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

Magnetite (Magnetite (Fe3O4)) — mineral

Magnetite

Magnetite (Fe3O4)

Yellow Aventurine (Quartz (SiO2) with inclusions) — mineral

Yellow Aventurine

Quartz (SiO2) with inclusions

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

Gneiss

Gneiss (High-grade metamorphic rock)

Quartz Vein in Host Rock (Likely Slate or Shale) (Hydrothermal Quartz (SiO2) in Pelitic host rock) — metamorphic

Quartz Vein in Host Rock (Likely Slate or Shale)

Hydrothermal Quartz (SiO2) in Pelitic host rock

Granite Gneiss (Gneiss (derived from granitic protolith)) — metamorphic

Granite Gneiss

Gneiss (derived from granitic protolith)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Lapis Lazuli (Low-grade) (Lapis Lazuli (Aggregate of Lazurite, Calcite, and Pyrite)) — metamorphic

Lapis Lazuli (Low-grade)

Lapis Lazuli (Aggregate of Lazurite, Calcite, and Pyrite)

Lapis Lazuli (Lapis Lazuli (Complex aggregate mainly of Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)) — metamorphic

Lapis Lazuli

Lapis Lazuli (Complex aggregate mainly of Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Lapis Lazuli (Lazurite-rich metamorphic rock ((Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)) — metamorphic

Lapis Lazuli

Lazurite-rich metamorphic rock ((Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Greenstone (Prase / Nephrite / Serpentine mix) (Metamorphosed ultramafic rock / greenstone facies) — metamorphic

Greenstone (Prase / Nephrite / Serpentine mix)

Metamorphosed ultramafic rock / greenstone facies

Gold Ore (Native Gold (Au) in Quartz or Silicate matrix) — mineral

Gold Ore

Native Gold (Au) in Quartz or Silicate matrix

Serpentinite (Serpentinite (a rock composed predominantly of serpentine group minerals)) — metamorphic

Serpentinite

Serpentinite (a rock composed predominantly of serpentine group minerals)

Serpentinite (Serpentinite (composed primarily of minerals in the Serpentine group)) — metamorphic

Serpentinite

Serpentinite (composed primarily of minerals in the Serpentine group)

Amazonite (Microcline Feldspar (KAlSi3O8)) — mineral

Amazonite

Microcline Feldspar (KAlSi3O8)

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Blue Kyanite (Kyanite (Al2SiO5)) — mineral

Blue Kyanite

Kyanite (Al2SiO5)

Milky Quartz with Iron Inclusions (Silicon Dioxide (SiO2)) — mineral

Milky Quartz with Iron Inclusions

Silicon Dioxide (SiO2)

Quartz (Silicon dioxide (SiO2)) — mineral

Quartz

Silicon dioxide (SiO2)

Likely polished bronzite or serpentine-rich rock (Probable bronzite, an iron-bearing orthopyroxene (Mg,Fe)SiO₃; exact identification requires testing) — mineral

Likely polished bronzite or serpentine-rich rock

Probable bronzite, an iron-bearing orthopyroxene (Mg,Fe)SiO₃; exact identification requires testing

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Milky Quartz with Iron Oxide Weathering (Silicon Dioxide (SiO2) with Goethite/Limonite coatings) — mineral

Milky Quartz with Iron Oxide Weathering

Silicon Dioxide (SiO2) with Goethite/Limonite coatings

Tumbled quartz-rich stone, possibly blue quartz or granite (Quartz (SiO₂), with probable feldspar and dark accessory minerals) — mineral

Tumbled quartz-rich stone, possibly blue quartz or granite

Quartz (SiO₂), with probable feldspar and dark accessory minerals

Unakite (Altered Granite (Granitic Metamorphic Rock)) — metamorphic

Unakite

Altered Granite (Granitic Metamorphic Rock)

Quartzite Pebble (with mineral veining) (Metamorphic Quartzite (SiO2)) — metamorphic

Quartzite Pebble (with mineral veining)

Metamorphic Quartzite (SiO2)

Greenstone (Metamorphic mafic rock (greenschist facies)) — metamorphic

Greenstone

Metamorphic mafic rock (greenschist facies)

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

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Unakite or Epidosite (Epidosite (Mineral composition: Epidote, Feldspar, and Quartz)) — metamorphic

Unakite or Epidosite

Epidosite (Mineral composition: Epidote, Feldspar, and Quartz)

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

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

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

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

Gneiss

Gneiss (High-grade Metamorphic Rock)

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Weathered quartz-rich metamorphic rock, likely quartzite (Quartzite; predominantly quartz (SiO₂), possibly with feldspar, mica, and iron-oxide staining) — metamorphic

Weathered quartz-rich metamorphic rock, likely quartzite

Quartzite; predominantly quartz (SiO₂), possibly with feldspar, mica, and iron-oxide staining

Greenstone / Epidosite (Epidosite (primary minerals: Epidote and Quartz)) — metamorphic

Greenstone / Epidosite

Epidosite (primary minerals: Epidote and Quartz)

Gossan (Iron Hat) (Goethite-Hematite rich weathered rock (Fe-hydroxides)) — sedimentary

Gossan (Iron Hat)

Goethite-Hematite rich weathered rock (Fe-hydroxides)

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

Yellow Quartz / Citrine Quartz

Silicon Dioxide (SiO2)

Marble (Recrystallized Calcite Rock (CaCO3)) — metamorphic

Marble

Recrystallized Calcite Rock (CaCO3)

Unidentifiable Specimen (Undetermined) — Unknown

Unidentifiable Specimen

Undetermined

Serpentinite (Serpentinite (composed largely of Serpentine group minerals like Antigorite, Lizardite, and Chrysotile: Mg3Si2O5(OH)4)) — metamorphic

Serpentinite

Serpentinite (composed largely of Serpentine group minerals like Antigorite, Lizardite, and Chrysotile: Mg3Si2O5(OH)4)