Rock Identifier

Category

Metamorphic (Modified)

Browse metamorphic (modified) specimens identified by the Rock Identifier community.

Learn about Metamorphic (Modified) in the encyclopedia

Metabasalt

Eulysite

Anthracite

Metaquartzite

Slate

Marble

Hornfels

Metarhyolite

Cordierite Hornfels

Cordierite Hornfels

Metagabbro

Calc-Silicate Rock

Calc-Silicate Rock

Chlorite Schist

Chlorite Schist

Biotite-bearing gneiss (probable) (Foliated quartz–feldspar gneiss with biotite mica) — metamorphic

Biotite-bearing gneiss (probable)

Foliated quartz–feldspar gneiss with biotite mica

Gneiss (Granitic Gneiss) (Gneiss (composed primarily of Quartz, Feldspar, and Mica)) — metamorphic

Gneiss (Granitic Gneiss)

Gneiss (composed primarily of Quartz, Feldspar, and Mica)

Biotite Schist (Biotite Gneissic Schist (K(Mg,Fe)3AlSi3O10(OH)2)) — metamorphic

Biotite Schist

Biotite Gneissic Schist (K(Mg,Fe)3AlSi3O10(OH)2)

Greenschist (containing Epidote and Quartz) (Greenschist (Epidote-Chlorite-Actinolite Schist)) — metamorphic

Greenschist (containing Epidote and Quartz)

Greenschist (Epidote-Chlorite-Actinolite Schist)

Schist (likely Mica Schist) (Mica Schist) — metamorphic

Schist (likely Mica Schist)

Mica Schist

Epidotite (Unakite-related Epidote) (Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH))) — metamorphic

Epidotite (Unakite-related Epidote)

Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH))

Schist (Mica Schist (Metamorphic Rock)) — metamorphic

Schist

Mica Schist (Metamorphic Rock)

Green aventurine (likely) (Quartz variety, SiO₂, colored commonly by fuchsite mica or chlorite) — mineral

Green aventurine (likely)

Quartz variety, SiO₂, colored commonly by fuchsite mica or chlorite

Prehnite (Prehnite (Ca2Al2Si3O10(OH)2)) — mineral

Prehnite

Prehnite (Ca2Al2Si3O10(OH)2)

Quartz Veined Mudstone (Metasedimentary rock with Quartz (SiO2) veins) — metamorphic

Quartz Veined Mudstone

Metasedimentary rock with Quartz (SiO2) veins

Milky Quartz with Nephrite Jade (Silicon Dioxide (SiO2) with Ca2(Mg,Fe)5Si8O22(OH)2) — mineral/metamorphic

Milky Quartz with Nephrite Jade

Silicon Dioxide (SiO2) with Ca2(Mg,Fe)5Si8O22(OH)2

mineral/metamorphic

Biotite on Matrix (Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2)) — mineral

Biotite on Matrix

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

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

Muscovite Mica

Muscovite (KAl2(AlSi3O10)(OH)2)

Black Tourmaline (Schorl) (NaFe3+3Al6(BO3)3Si6O18(OH)4) — mineral

Black Tourmaline (Schorl)

NaFe3+3Al6(BO3)3Si6O18(OH)4

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

Muscovite Mica

Muscovite (KAl2(AlSi3O10)(OH)2)

Pink Rhodonite (Rhodonite (Manganese Iron Magnesium Calcium Silicate - (Mn,Fe,Mg,Ca)SiO3)) — mineral

Pink Rhodonite

Rhodonite (Manganese Iron Magnesium Calcium Silicate - (Mn,Fe,Mg,Ca)SiO3)

Ruby (faceted gemstone) (Corundum (Al2O3 with Cr impurities)) — gemstone

Ruby (faceted gemstone)

Corundum (Al2O3 with Cr impurities)

Blue Kyanite (Kyanite (Al2SiO5)) — mineral

Blue Kyanite

Kyanite (Al2SiO5)

Labradorite ((Na, Ca)(Si, Al)4O8) — mineral

Labradorite

(Na, Ca)(Si, Al)4O8

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

Nephrite Jade

Ca2(Mg, Fe)5Si8O22(OH)2

Quartzite Pebble (Iron-stained Quartz) (Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions) — metamorphic

Quartzite Pebble (Iron-stained Quartz)

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions

Unakite (Metamorphosed Granite (Orthoclase, Epidote, Quartz)) — metamorphic

Unakite

Metamorphosed Granite (Orthoclase, Epidote, Quartz)

Basalt Pebble (Aphanitic Mafic Igneous Rock) — igneous

Basalt Pebble

Aphanitic Mafic Igneous Rock

Basalt Pebble (Extrusive Igneous Rock) — igneous

Basalt Pebble

Extrusive Igneous Rock

Basalt Pebble (Aphanitic Igneous Rock) — igneous

Basalt Pebble

Aphanitic Igneous Rock

Biotite Mica Schist (Metamorphic Rock containing Biotite K(Mg,Fe)3AlSi3O10(OH)2) — metamorphic

Biotite Mica Schist

Metamorphic Rock containing Biotite K(Mg,Fe)3AlSi3O10(OH)2

Eclogite (Eclogite (Omphacite + Pyrope)) — metamorphic

Eclogite

Eclogite (Omphacite + Pyrope)

Schist (Schist (Foliated Metamorphic Rock)) — metamorphic

Schist

Schist (Foliated Metamorphic Rock)

Quartz Vein in Host Rock (Breccia/Rhyolite) (Silicon Dioxide (SiO2) with matrix) — Mineral in Igneous/Sedimentary host

Quartz Vein in Host Rock (Breccia/Rhyolite)

Silicon Dioxide (SiO2) with matrix

Mineral in Igneous/Sedimentary host

Gneiss (Metamorphic Pebble) (Metamorphic Rock (Quartz-Feldspar-Biotite Gneiss)) — metamorphic

Gneiss (Metamorphic Pebble)

Metamorphic Rock (Quartz-Feldspar-Biotite Gneiss)

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

Epidote

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

Rhodonite (Rhodonite, manganese inosilicate — MnSiO₃; the specimen may include quartz, feldspar, and black manganese-oxide minerals in the matrix) — mineral

Rhodonite

Rhodonite, manganese inosilicate — MnSiO₃; the specimen may include quartz, feldspar, and black manganese-oxide minerals in the matrix

Epidote and Quartz in Basalt (Epidote [Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)] in Metabasalt) — metamorphic

Epidote and Quartz in Basalt

Epidote [Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)] in Metabasalt

Eclogite (Eclogite (Pyrope garnet and Omphacite pyroxene)) — metamorphic

Eclogite

Eclogite (Pyrope garnet and Omphacite pyroxene)

Mica Schist with Quartz (Muscovite/Biotite Schist) — metamorphic

Mica Schist with Quartz

Muscovite/Biotite Schist

Quartzite with Quartz Veins (Metamorphic Quartz-rich Rock (SiO2)) — metamorphic

Quartzite with Quartz Veins

Metamorphic Quartz-rich Rock (SiO2)

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

Sodalite

Sodalite, Na8(Al6Si6O24)Cl2

Rhodonite (Rhodonite (MnSiO3)) — Mineral

Rhodonite

Rhodonite (MnSiO3)

Peacock Ore (Bornite (Cu5FeS4) with surface tarnish) — mineral

Peacock Ore

Bornite (Cu5FeS4) with surface tarnish

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

Blue Apatite

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

Bismuthinite with Chalcopyrite and Quartz (Bismuthinite (Bi2S3) and Chalcopyrite (CuFeS2)) — mineral

Bismuthinite with Chalcopyrite and Quartz

Bismuthinite (Bi2S3) and Chalcopyrite (CuFeS2)

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

Apatite

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