Metamorphic (Pseudo Igneous)

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

Learn about Metamorphic (Pseudo Igneous) in the encyclopedia

View all →

Cordierite Hornfels

Migmatite

Hornblende Schist

Gneiss

Gneiss (High-grade regional metamorphic rock)

metamorphic

Banded Gneiss

Gneiss (High-grade metamorphic rock typically composed of Quartz, Feldspar, and Biotite/Amphiboles)

metamorphic

Banded Gneiss with Quartz Vein

Gneiss containing SiO2 (Quartz) intrusion

metamorphic

Gneiss (High-grade Metamorphic Rock)

Gneiss

metamorphic

Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

metamorphic

Gneiss

High-grade regional metamorphic Gneiss

metamorphic

Banded Gneiss

Gneiss (High-grade regional metamorphic rock)

metamorphic

Gneiss

metamorphic

Greenstone with Quartz Veining

Epidiorite or Metabasalt with SiO2 (Quartz) veins

metamorphic

Greenstone

Protolith of basalt, diabase, or gabbro; often contains minerals like chlorite, actinolite, and epidote

metamorphic

Biotite Schist

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

metamorphic

Gneiss (Metamorphosed Pebble)

Gneiss with Quartz/Feldspar banding

metamorphic

Granite Gneiss

Gneiss (Polymetamorphic Quartz-Feldspar-Mica rock)

metamorphic

Banded Gneiss

Gneiss (High-grade regional metamorphic rock)

metamorphic

Gneiss

Gneiss (High-grade Metamorphic Rock)

metamorphic

Gneiss

metamorphic

Greenschist (Chlorite Schist)

Greenschist (Metamorphic rock dominated by chlorite, actinolite, and epidote)

metamorphic

Mica in Quartz Host

Muscovite (KAl2(AlSi3O10)(OH)2) in Quartz (SiO2)

igneous

Gneiss (Granitic Gneiss)

Gneiss

metamorphic

Epidote in Granite Gneiss

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

metamorphic

Schist

Mica Schist (primarily Muscovite or Biotite sheet silicates)

metamorphic

Greenschist with Quartz Veining

Greenschist (commonly containing Chlorite, Actinolite, and Epidote)

metamorphic

Milky Quartz

Silicon Dioxide (SiO2)

mineral

Milky Quartz

Silicon Dioxide (SiO2)

mineral

Quartz / Quartzite

Silicon Dioxide (SiO2)

mineral / metamorphic

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

mineral

Black Tourmaline (Schorl)

Schorl (Na(Fe²⁺)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄)

mineral

Quartzite Pebble

Quartzite (SiO2)

metamorphic

Quartz in Matrix (possibly with Biotite or Hornblende)

Quartz (Silicon Dioxide, SiO2) in Granitic Matrix

igneous

Mica Group Minerals

There isn't a single scientific name as 'Mica' refers to a group of phyllosilicate minerals. Common scientific names include Muscovite (KAl₂ (AlSi₃O₁₀)(OH)₂), Biotite (K(Mg,Fe)₃AlSi₃O₁₀(OH)₂), Phlogopite (KMg₃AlSi₃O₁₀(OH)₂), and Lepidolite (K(Li,Al)₃(Al,Si,Rb)₄O₁₀(F,OH)₂).

Mineral