Metamorphic

Browse metamorphic specimens identified by the Rock Identifier community.

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Adinole

Amphibolite

Anthracite

Biotite Schist

Blueschist

Calc-Silicate Rock

Calc-schist

Cataclasite

Chlorite Schist

Cipollino Marble

Cordierite Hornfels

Eclogite

Epidote

Epidote (Ca2(Al2,Fe3+)AlSi3O12(OH))

mineral

Epidosite (Unakite-related)

Epidosite (composed primarily of Epidote and Quartz)

metamorphic

Garnet Schist

Almandine Garnet in Mica Schist (Fe3Al2(SiO4)3)

metamorphic

Epidote Water-Worn Pebble

Epidote {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)

metamorphic

Garnet in Matrix

Almandine or Spessartine Garnet in Quartz/Schist Matrix (X3Al2(SiO4)3)

metamorphic

Feldspar in Matrix

Feldspar group minerals in metamorphic or igneous matrix

igneous

Tumbled rhodonite

Rhodonite, manganese inosilicate (MnSiO₃)

mineral

Blue cabochon gemstone, likely synthetic glass or dyed stone

Indeterminate from image; possible glass, synthetic spinel, sodalite, or lapis lazuli

gemstone

Quartz-rich altered rock, possibly quartz vein with mica

Microcrystalline to coarse quartz (SiO₂) with probable muscovite/biotite mica and iron-oxide staining

metamorphic

Sunstone and Garnet

Plagioclase Feldspar ((Na,Ca)(Al,Si)4O8) and Almandine Garnet (Fe3Al2(SiO4)3)

gemstone

Tumbled green aventurine

Quartz (SiO₂), commonly containing fuchsite mica inclusions

mineral

Green Aventurine

Aventurine Quartz (SiO2 + Fuchsite inclusions)

mineral

Jade (likely Jadeite)

Jadeite (a pyroxene mineral) or Nephrite (a variety of amphibole mineral)

Mineral

Quartzite Pebble

Quartzite (SiO2)

metamorphic

Phyllite

Phyllite (Intermediate grade metamorphic rock)

metamorphic

Fuchsite

Chromium-rich Muscovite (KAl2(AlSi3O10)(OH,F)2 with Cr replacements)

mineral

Epidote with quartz/feldspar

Epidote, Ca2(Al,Fe)3(SiO4)3(OH)

metamorphic

Gneiss or Schist

Gneiss or Mica Schist with Garnet

Metamorphic

Garnet in Schist

Almandine Garnet in Mica-Schist (Fe3Al2(SiO4)3)

metamorphic

Banded Metamorphic Rock (likely Quartzite or Serpentinite/Soapstone)

Metamorphic Rock (possibly a banded Quartzite or a foliated Serpentinite/Talc Schist based on appearance, general term for such a rock is 'Banded Metamorphic Rock' or 'Gneiss' if pronounced banding of different minerals)

Metamorphic

Jade

There are two distinct minerals commonly known as Jade: Nephrite (a calcium magnesium silicate - Ca2(Mg,Fe)5Si8O22(OH)2) and Jadeite (a sodium aluminum silicate - NaAlSi2O6). Based on the image showing a typically softer, more fibrous appearance, it is likely Nephrite.

Mineral