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

Amphibolite (Amphibolite (rich in amphibole and plagioclase feldspar)) — metamorphic

Amphibolite

Amphibolite (rich in amphibole and plagioclase feldspar)

Greenschist (Greenstone River Pebble) (Greenschist (Chlorite Schist)) — metamorphic

Greenschist (Greenstone River Pebble)

Greenschist (Chlorite Schist)

Greenschist (Greenschist (Actinolite-Chlorite Schist)) — metamorphic

Greenschist

Greenschist (Actinolite-Chlorite Schist)

Gneiss (Metamorphic Gneiss (High-grade regional metamorphism)) — metamorphic

Gneiss

Metamorphic Gneiss (High-grade regional metamorphism)

Gneiss (Metamorphic rock of high-grade regional metamorphism) — metamorphic

Gneiss

Metamorphic rock of high-grade regional metamorphism

Gneiss (Metamorphic Gneiss (High-grade regional metamorphism)) — metamorphic

Gneiss

Metamorphic Gneiss (High-grade regional metamorphism)

Garnet-Bearing Schist (Almandine Garnet Schist) — metamorphic

Garnet-Bearing Schist

Almandine Garnet Schist

Biotite Schist (Biotite-rich Schist [K(Mg,Fe)3AlSi3O10(F,OH)2]) — metamorphic

Biotite Schist

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

Quartz (Smoky/Brown variety) (Silicon dioxide (SiO2)) — mineral

Quartz (Smoky/Brown variety)

Silicon dioxide (SiO2)

Kfeldspar (Potassium Feldspar) (KAlSi3O8) — mineral

Kfeldspar (Potassium Feldspar)

KAlSi3O8

Quartz (Pink / Rose Quartz variant) (Silicon Dioxide (SiO2)) — mineral

Quartz (Pink / Rose Quartz variant)

Silicon Dioxide (SiO2)

Yellow Agate (Silicon Dioxide (Chalcedony), SiO2) — gemstone

Yellow Agate

Silicon Dioxide (Chalcedony), SiO2

Rose Quartz (Silicon Dioxide (SiO2)) — mineral

Rose Quartz

Silicon Dioxide (SiO2)

Tumbled Grey Agate (Silicon Dioxide (Chalcedony variety), SiO2) — mineral

Tumbled Grey Agate

Silicon Dioxide (Chalcedony variety), SiO2

Chrysotile Asbestos (Mg3Si2O5(OH)4) — mineral

Chrysotile Asbestos

Mg3Si2O5(OH)4

Chalcopyrite (Copper Iron Sulfide (CuFeS2)) — mineral

Chalcopyrite

Copper Iron Sulfide (CuFeS2)

K-Feldspar (Potassium Feldspar / Pink Feldspar) (KAlSi3O8 (Potassium Aluminum Silicate)) — mineral

K-Feldspar (Potassium Feldspar / Pink Feldspar)

KAlSi3O8 (Potassium Aluminum Silicate)

Quartz with Inclusions (Silicon Dioxide (SiO2)) — mineral

Quartz with Inclusions

Silicon Dioxide (SiO2)

Blue Topaz (Al2SiO4(F,OH)2) — gemstone

Blue Topaz

Al2SiO4(F,OH)2

Tourmaline crystal (Tourmaline Group (Complex Borosilicate)) — mineral

Tourmaline crystal

Tourmaline Group (Complex Borosilicate)

Agate (Silicon Dioxide (Chalcedony), SiO2) — gemstone

Agate

Silicon Dioxide (Chalcedony), SiO2

Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Potassium Feldspar (Microcline / Orthoclase) (KAlSi3O8) — mineral

Potassium Feldspar (Microcline / Orthoclase)

KAlSi3O8

Moonstone (Orthoclase (KAlSi3O8) or Oligoclase with adularescence) — gemstone

Moonstone

Orthoclase (KAlSi3O8) or Oligoclase with adularescence

Garnet (Silicate mineral group (often Pyrope or Almandine in this color range)) — gemstone

Garnet

Silicate mineral group (often Pyrope or Almandine in this color range)

Red Calcite (Calcium Carbonate (CaCO3)) — mineral

Red Calcite

Calcium Carbonate (CaCO3)

Agate (SiO2 (Chalcedony/Quartz)) — sedimentary

Agate

SiO2 (Chalcedony/Quartz)

Quartz (Yellow/Citrine Variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Yellow/Citrine Variety)

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal) (Silicon Dioxide (SiO2)) — mineral

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Hematite (Iron Oxide (Fe2O3)) — mineral

Hematite

Iron Oxide (Fe2O3)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Amazonite (Microcline (K(AlSi3O8))) — mineral

Amazonite

Microcline (K(AlSi3O8))

Rhodochrosite (Rhodochrosite, Manganese Carbonate (MnCO3)) — mineral

Rhodochrosite

Rhodochrosite, Manganese Carbonate (MnCO3)

Quartz pebble / River stone (SiO2 (Silicon Dioxide)) — mineral

Quartz pebble / River stone

SiO2 (Silicon Dioxide)

Pyrite in Matrix (Fool's Gold) (Iron Sulfide (FeS2)) — mineral

Pyrite in Matrix (Fool's Gold)

Iron Sulfide (FeS2)

Gneiss (Metamorphosed Granitic Rock) (Gneiss (composed mainly of quartz, feldspar, biotite, and/or hornblende)) — metamorphic

Gneiss (Metamorphosed Granitic Rock)

Gneiss (composed mainly of quartz, feldspar, biotite, and/or hornblende)

Unakite (Altered Granite (Epidotized Granite)) — metamorphic

Unakite

Altered Granite (Epidotized Granite)

Yellow Quartzite Pebble (Quartzite (SiO2)) — metamorphic

Yellow Quartzite Pebble

Quartzite (SiO2)

Basalt (Weathered River Pebble) (Extrusive Igneous Rock) — igneous

Basalt (Weathered River Pebble)

Extrusive Igneous Rock

Mica Schist with Quartz (Mica-Quartz Schist (Muscovite subclass)) — metamorphic

Mica Schist with Quartz

Mica-Quartz Schist (Muscovite subclass)

Green Schist (Greenschist) (Greenschist facies metamorphic rock) — metamorphic

Green Schist (Greenschist)

Greenschist facies metamorphic rock