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

Quartzite Pebble (Metamorphic Quartzite) — metamorphic

Quartzite Pebble

Metamorphic Quartzite

Quartzite Pebble (Metamorphic Quartzite) — metamorphic

Quartzite Pebble

Metamorphic Quartzite

Quartzite Pebble (Metamorphic Quartzite) — metamorphic

Quartzite Pebble

Metamorphic Quartzite

Quartzite (Metamorphic Quartzite) — metamorphic

Quartzite

Metamorphic Quartzite

Schist (Metamorphic Schist) — metamorphic

Schist

Metamorphic Schist

Quartzite Pebble (Metamorphic Quartzite) — metamorphic

Quartzite Pebble

Metamorphic Quartzite

Quartzite (Metamorphic Quartzite) — metamorphic

Quartzite

Metamorphic Quartzite

Quartzite (Metamorphic Quartzite) — metamorphic

Quartzite

Metamorphic Quartzite

Quartzite (Metamorphic Quartzite) — metamorphic

Quartzite

Metamorphic Quartzite

Quartzite (Metamorphic Quartzite) — metamorphic

Quartzite

Metamorphic Quartzite

Quartzite (Metamorphic Quartzite) — metamorphic

Quartzite

Metamorphic Quartzite

Gneiss (River Cobble) (Metamorphic Gneiss) — metamorphic

Gneiss (River Cobble)

Metamorphic Gneiss

Rough Garnet (Almandine) (Almandine Garnet (Fe3Al2(SiO4)3)) — mineral

Rough Garnet (Almandine)

Almandine Garnet (Fe3Al2(SiO4)3)

Magnetite (Lodestone) (Magnetite (Fe3O4)) — mineral

Magnetite (Lodestone)

Magnetite (Fe3O4)

Rhodonite (Rhodonite (Mn, Fe, Mg, Ca)SiO3) — mineral

Rhodonite

Rhodonite (Mn, Fe, Mg, Ca)SiO3

Arsenopyrite with Schist Matrix (Arsenopyrite (FeAsS)) — mineral

Arsenopyrite with Schist Matrix

Arsenopyrite (FeAsS)

Blue gemstone, likely iolite or blue sapphire (Iolite (cordierite, Mg₂Al₄Si₅O₁₈) or corundum (sapphire, Al₂O₃)) — gemstone

Blue gemstone, likely iolite or blue sapphire

Iolite (cordierite, Mg₂Al₄Si₅O₁₈) or corundum (sapphire, Al₂O₃)

Rhodonite (Manganese Silicate (Mn,Fe,Mg,Ca)SiO3) — mineral

Rhodonite

Manganese Silicate (Mn,Fe,Mg,Ca)SiO3

Green Aventurine (Aventurine Quartz (SiO2 with Fuchsite inclusions)) — metamorphic

Green Aventurine

Aventurine Quartz (SiO2 with Fuchsite inclusions)

Aventurine (Green Quartz) (Silicon dioxide with inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)) — mineral

Aventurine (Green Quartz)

Silicon dioxide with inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)

Sapphire (Corundum (Al2O3)) — gemstone

Sapphire

Corundum (Al2O3)

Bornite (Peacock Ore) (Bornite (Cu5FeS4)) — mineral

Bornite (Peacock Ore)

Bornite (Cu5FeS4)

Magnetite (Iron(II,III) oxide (Fe3O4)) — mineral

Magnetite

Iron(II,III) oxide (Fe3O4)

Bornite (Peacock Ore) (Bornite (Cu5FeS4)) — mineral

Bornite (Peacock Ore)

Bornite (Cu5FeS4)

Kyanite (Kyanite (Al2SiO5)) — Mineral

Kyanite

Kyanite (Al2SiO5)

Amphibolite (Amphibolite, typically composed mainly of hornblende and plagioclase feldspar) — metamorphic

Amphibolite

Amphibolite, typically composed mainly of hornblende and plagioclase feldspar

Garnet-Mica Schist (Garnetiferous Porphyroblastic Schist) — metamorphic

Garnet-Mica Schist

Garnetiferous Porphyroblastic Schist

Almandine Garnet (Almandine (Fe3Al2(SiO4)3)) — mineral

Almandine Garnet

Almandine (Fe3Al2(SiO4)3)

Garnet (Almandine-Pyrope group, X3Y2(SiO4)3) — mineral

Garnet

Almandine-Pyrope group, X3Y2(SiO4)3

Magnetite (Magnetite (Fe3O4)) — mineral

Magnetite

Magnetite (Fe3O4)

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

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

Dumortierite Quartz (Al7BO3(SiO4)3O3 (Aluminum borate silicate)) — mineral

Dumortierite Quartz

Al7BO3(SiO4)3O3 (Aluminum borate silicate)

Blue Apatite (Fluorapatite (Ca5(PO4)3F)) — mineral

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Fuchsite (Chrome Mica) (K(Al,Cr)2(AlSi3O10)(OH)2) — mineral

Fuchsite (Chrome Mica)

K(Al,Cr)2(AlSi3O10)(OH)2

Blue gemstone in a decorative setting (possibly blue spinel or sapphire) (Unidentified blue faceted gemstone; sapphire is corundum (Al₂O₃), while spinel is MgAl₂O₄) — gemstone

Blue gemstone in a decorative setting (possibly blue spinel or sapphire)

Unidentified blue faceted gemstone; sapphire is corundum (Al₂O₃), while spinel is MgAl₂O₄

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

Ruby (Corundum)

Aluminum oxide (Al2O3) with Chromium traces

Rhodonite (Rhodonite (Manganese Silicate), chemical formula: (Mn,Fe,Mg,Ca)SiO3) — Mineral

Rhodonite

Rhodonite (Manganese Silicate), chemical formula: (Mn,Fe,Mg,Ca)SiO3

Blue Calcite (Calcium Carbonate (CaCO3)) — mineral

Blue Calcite

Calcium Carbonate (CaCO3)

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

Green Aventurine

SiO2 (Silicon Dioxide with Fuchsite inclusions)

Rhodonite (Manganese silicate: (Mn,Fe,Mg,Ca)SiO3) — mineral

Rhodonite

Manganese silicate: (Mn,Fe,Mg,Ca)SiO3

Magnetite-rich Iron Ore (Magnetite (Fe3O4)) — mineral

Magnetite-rich Iron Ore

Magnetite (Fe3O4)

Rhodonite (Manganese Silicate (Mn,Fe,Mg,Ca)SiO3) — mineral

Rhodonite

Manganese Silicate (Mn,Fe,Mg,Ca)SiO3