Rock Identifier

Category

Metamorphic Or Sedimentary Depending On Local Grade

Browse metamorphic or sedimentary depending on local grade specimens identified by the Rock Identifier community.

Learn about Metamorphic Or Sedimentary Depending On Local Grade in the encyclopedia

Greenschist

Greenschist

Granulite

Granulite

Slate

Slate

Turbidite

Turbidite

Gneiss

Gneiss

Schist

Schist

Chlorite Schist

Chlorite Schist

Amphibolite

Amphibolite

Garnet Schist

Garnet Schist

Migmatite

Migmatite

Biotite Schist

Biotite Schist

Khondalite

Khondalite

Quartz-veined Metamorphic Rock (Quartz Vein in Phyllite or Schist (SiO2 in Silicate Matrix)) — metamorphic

Quartz-veined Metamorphic Rock

Quartz Vein in Phyllite or Schist (SiO2 in Silicate Matrix)

Gneiss (Metamorphic Rock) (Gneiss) — metamorphic

Gneiss (Metamorphic Rock)

Gneiss

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

Amethyst

Silicon Dioxide (SiO2) with Iron impurities

Sandstone (Sandstone (clastic sedimentary rock)) — Rock

Sandstone

Sandstone (clastic sedimentary rock)

Iolite-bearing Gneiss (Cordierite) (Cordierite (Mg2Al4Si5O18) in Gneiss matrix) — metamorphic

Iolite-bearing Gneiss (Cordierite)

Cordierite (Mg2Al4Si5O18) in Gneiss matrix

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

Black Sapphire

Corundum (Al2O3 with iron and titanium impurities)

Banded Gneiss (Gneiss) — Metamorphic

Banded Gneiss

Gneiss

Quartz (Silicon Dioxide (SiO₂)) — Mineral

Quartz

Silicon Dioxide (SiO₂)

River Cobble (likely Metasedimentary or Basalt) (Metamorphosed Siltstone or Altered Fine-grained Igneous Rock) — metamorphic

River Cobble (likely Metasedimentary or Basalt)

Metamorphosed Siltstone or Altered Fine-grained Igneous Rock

Slate (Slate) — metamorphic

Slate

Slate

Basalt with Epidote (Greenstone) (Epidote-bearing Metabasalt) — metamorphic

Basalt with Epidote (Greenstone)

Epidote-bearing Metabasalt

Nephrite Jade (Nephrite (Silicate mineral: Ca2(Mg, Fe)5Si8O22(OH)2)) — metamorphic

Nephrite Jade

Nephrite (Silicate mineral: Ca2(Mg, Fe)5Si8O22(OH)2)

Nuummite (Nuummite (ortho-amphibole rock)) — metamorphic

Nuummite

Nuummite (ortho-amphibole rock)

Quartzite (or Milky Quartz pebble) (Quartzite (Metamorphosed Sandstone) / Silicon Dioxide (SiO2)) — metamorphic

Quartzite (or Milky Quartz pebble)

Quartzite (Metamorphosed Sandstone) / Silicon Dioxide (SiO2)

Natural Gemstone Cabochons (Ruby, Moonstone, Emerald, Citrine) (Ruby (Al2O3:Cr), Moonstone (KAlSi3O8), Emerald (Be3Al2(SiO3)6:Cr), Citrine (SiO2)) — mineral

Natural Gemstone Cabochons (Ruby, Moonstone, Emerald, Citrine)

Ruby (Al2O3:Cr), Moonstone (KAlSi3O8), Emerald (Be3Al2(SiO3)6:Cr), Citrine (SiO2)

Epidote in Matrix (Dragon Stone variant) (Epidote with Quartz/Feldspar (Ca2(Al,Fe)3(SiO4)3(OH))) — metamorphic

Epidote in Matrix (Dragon Stone variant)

Epidote with Quartz/Feldspar (Ca2(Al,Fe)3(SiO4)3(OH))

Sodalite (Sodalite, Na8(Al6Si6O24)Cl2) — Mineral

Sodalite

Sodalite, Na8(Al6Si6O24)Cl2

Rhodonite (Rhodonite (MnSiO3)) — Mineral

Rhodonite

Rhodonite (MnSiO3)

Sandstone or Siltstone (Arenite (if sandstone)) — Sedimentary

Sandstone or Siltstone

Arenite (if sandstone)

Greenschist (Greenschist) — metamorphic

Greenschist

Greenschist

Wavellite (Wavellite (Al3(PO4)2(OH, F)3·5H2O)) — mineral

Wavellite

Wavellite (Al3(PO4)2(OH, F)3·5H2O)

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

Prehnite

Prehnite (Ca2Al(AlSi3O10)(OH)2)

Pyrite (Iron Disulfide (FeS2)) — mineral

Pyrite

Iron Disulfide (FeS2)

Slate (Slate (Low-grade foliated metamorphic rock)) — metamorphic

Slate

Slate (Low-grade foliated metamorphic rock)

Schist (Mica Schist) — metamorphic

Schist

Mica Schist

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

Mica Schist

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

Cat's Eye Moonstone (Simulated/Synthetic or natural Cat's Eye Quartz/Glass) (There is no single scientific name. The appearance suggests either: Moonstone (feldspar group), Cat's Eye Quartz (SiO2), Apatite (Ca5(PO4)3(F,Cl,OH)), or most likely a synthetic material such as Fiber Optic Glass or 'Opalite' (a type of glass).) — Mineral

Cat's Eye Moonstone (Simulated/Synthetic or natural Cat's Eye Quartz/Glass)

There is no single scientific name. The appearance suggests either: Moonstone (feldspar group), Cat's Eye Quartz (SiO2), Apatite (Ca5(PO4)3(F,Cl,OH)), or most likely a synthetic material such as Fiber Optic Glass or 'Opalite' (a type of glass).

Diamond (Carbon (C), specifically in an isometric crystal system.) — Mineral

Diamond

Carbon (C), specifically in an isometric crystal system.

Rhodonite (Manganese Inosilicate (MnSiO3), often with Ca, Fe, Mg, Zn) — Mineral

Rhodonite

Manganese Inosilicate (MnSiO3), often with Ca, Fe, Mg, Zn

Schist (Mica Schist (primarily composed of quartz, feldspar, and mica)) — metamorphic

Schist

Mica Schist (primarily composed of quartz, feldspar, and mica)

Schist (Mica Schist) — metamorphic

Schist

Mica Schist

Mica Schist (Muscovite/Biotite Schist) — metamorphic

Mica Schist

Muscovite/Biotite Schist

Strawberry Quartz (Quartz with Hematite or Goethite inclusions (SiO2 + inclusions)) — mineral

Strawberry Quartz

Quartz with Hematite or Goethite inclusions (SiO2 + inclusions)

Muscovite Mica (Muscovite: KAl2(AlSi3O10)(OH)2) — mineral

Muscovite Mica

Muscovite: KAl2(AlSi3O10)(OH)2

Mookaite Jasper (Siliceous sedimentary rock (variety of Jasper/Chert)) — Sedimentary Rock

Mookaite Jasper

Siliceous sedimentary rock (variety of Jasper/Chert)

Sedimentary Rock

Epidote in Quartz (Quartz with Epidote inclusions (SiO2 with Ca2(Al,Fe)3(SiO4)3(OH) inclusions)) — Mineral

Epidote in Quartz

Quartz with Epidote inclusions (SiO2 with Ca2(Al,Fe)3(SiO4)3(OH) inclusions)

Diamond (likely facet or crystal shard) (Diamond (C)) — mineral

Diamond (likely facet or crystal shard)

Diamond (C)

Ambergris (Ambra grisea) — Organic (often found by beachcombers)

Ambergris

Ambra grisea

Organic (often found by beachcombers)

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

Dendritic Agate (Tumbled)

Silicon Dioxide (SiO2) with inclusions

Diamond (Native Carbon (C)) — mineral

Diamond

Native Carbon (C)

Quartzite (Quartzite) — metamorphic

Quartzite

Quartzite

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

Mica Schist

Mica Schist (primarily Muscovite or Biotite sheet silicates)