Rock Identifier

Category

Metamorphic Or Igneous Alteration

Browse metamorphic or igneous alteration specimens identified by the Rock Identifier community.

Greenstone Pebble (Metabasalt (often containing chlorite, actinolite, or epidote)) — metamorphic

Greenstone Pebble

Metabasalt (often containing chlorite, actinolite, or epidote)

Ruby Zoisite (Anyolite (Ca2Al3(SiO4)3(OH) + Al2O3:Cr)) — metamorphic

Ruby Zoisite

Anyolite (Ca2Al3(SiO4)3(OH) + Al2O3:Cr)

Greenstone / Nephrite Jade (Tremolite-actinolite series (Ca2(Mg,Fe)5Si8O22(OH)2)) — metamorphic

Greenstone / Nephrite Jade

Tremolite-actinolite series (Ca2(Mg,Fe)5Si8O22(OH)2)

Greenschist (Greenschist (Chlorite-actinolite schist)) — metamorphic

Greenschist

Greenschist (Chlorite-actinolite schist)

Gneiss (Banded Gneiss) (Gneiss) — metamorphic

Gneiss (Banded Gneiss)

Gneiss

Grey River Stone (Gneiss/Schist mix) (Foliated Metamorphic Rock (variable mineral formula)) — metamorphic

Grey River Stone (Gneiss/Schist mix)

Foliated Metamorphic Rock (variable mineral formula)

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

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

Nephrite Jade

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

Greenschist (Chlorite schist (Metamorphic rock dominated by chlorite, epidote, and actinolite)) — metamorphic

Greenschist

Chlorite schist (Metamorphic rock dominated by chlorite, epidote, and actinolite)

Greenstone (Metabaltic/Greenschist) (Chlorite schist / Meta-basalt) — metamorphic

Greenstone (Metabaltic/Greenschist)

Chlorite schist / Meta-basalt

Blue Sapphire (Corundum (Al2O3)) — mineral

Blue Sapphire

Corundum (Al2O3)

Dragon Stone (Dragon Blood Jasper) (Epidote with Pietersite or Red Jasper inclusions (varied SiO2 and Ca2(Al,Fe)3(SiO4)3(OH))) — metamorphic

Dragon Stone (Dragon Blood Jasper)

Epidote with Pietersite or Red Jasper inclusions (varied SiO2 and Ca2(Al,Fe)3(SiO4)3(OH))

Green Aventurine and Clear Quartz (Aventurine (variety of Quartz - SiO2) and Quartz (SiO2)) — Mineral

Green Aventurine and Clear Quartz

Aventurine (variety of Quartz - SiO2) and Quartz (SiO2)

Muscovite Mica (Granitic Pegmatite) (Muscovite - KAl2(AlSi3O10)(OH)2) — mineral

Muscovite Mica (Granitic Pegmatite)

Muscovite - KAl2(AlSi3O10)(OH)2

Corundum (Ruby variety) (Aluminium oxide (Al2O3)) — mineral

Corundum (Ruby variety)

Aluminium oxide (Al2O3)

Schist (Mica Schist) — metamorphic

Schist

Mica Schist

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

Green Aventurine

Quartz (Silicon Dioxide) with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)

Blue Sapphire (Corundum (Al2O3 - Aluminum Oxide)) — mineral

Blue Sapphire

Corundum (Al2O3 - Aluminum Oxide)

Schist (Mica Schist (formula variable based on mineral content, typically containing [K,Al,Fe,Mg,Si,O,H])) — metamorphic

Schist

Mica Schist (formula variable based on mineral content, typically containing [K,Al,Fe,Mg,Si,O,H])

Biotite (Black Mica) (Biotite [K(Mg,Fe)3(AlSi3O10)(F,OH)2]) — mineral

Biotite (Black Mica)

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

Orthoclase Feldspar (Potassium Aluminum Silicate (KAlSi3O8)) — mineral

Orthoclase Feldspar

Potassium Aluminum Silicate (KAlSi3O8)

Hematite (Iron(III) oxide (Fe2O3)) — mineral

Hematite

Iron(III) oxide (Fe2O3)

Quartz (Quartz (SiO₂)) — Mineral

Quartz

Quartz (SiO₂)

Muscovite Mica (Muscovite (Potassium Aluminum Silicate Hydroxide Fluoride), KAl2(AlSi3O10)(OH,F)2) — mineral

Muscovite Mica

Muscovite (Potassium Aluminum Silicate Hydroxide Fluoride), KAl2(AlSi3O10)(OH,F)2

Epidote with Magnetite/Hematite inclusions (Epidote (Ca2(Al2,Fe3+)(SiO4)3(OH)) with Iron Oxides) — mineral

Epidote with Magnetite/Hematite inclusions

Epidote (Ca2(Al2,Fe3+)(SiO4)3(OH)) with Iron Oxides

Agate (Silicon Dioxide (SiO2) - Chalcedony variety) — mineral

Agate

Silicon Dioxide (SiO2) - Chalcedony variety

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Rose Quartz (Rose Quartz (SiO2)) — Mineral

Rose Quartz

Rose Quartz (SiO2)

Quartz (Silicon dioxide (SiO2)) — mineral

Quartz

Silicon dioxide (SiO2)

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

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Quartz (SiO2 (Silicon Dioxide)) — mineral

Quartz

SiO2 (Silicon Dioxide)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

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

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

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

Labradorite

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

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

Milky Quartz Pebble

Silicon Dioxide (SiO2)

Ruby (Corundum (Aluminum Oxide with Chromium), Al2O3:Cr) — mineral

Ruby

Corundum (Aluminum Oxide with Chromium), Al2O3:Cr

Sodalite (Sunset Sodalite) (Sodalite: Na8(Al6Si6O24)Cl2) — mineral

Sodalite (Sunset Sodalite)

Sodalite: Na8(Al6Si6O24)Cl2

Yellow Quartz Pebble (SiO2 (Silicon Dioxide) with Iron Impurities) — mineral

Yellow Quartz Pebble

SiO2 (Silicon Dioxide) with Iron Impurities

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Quartz (Vein Quartz) (Silicon Dioxide (SiO2)) — mineral

Quartz (Vein Quartz)

Silicon Dioxide (SiO2)

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)