Metamorphic Rock (Specifically A Rock Composed Of Minerals)

Browse metamorphic rock (specifically a rock composed of minerals) specimens identified by the Rock Identifier community.

Slate

Foliated Metamorphic Rock (composed primarily of Quartz, Muscovite, and Illite)

metamorphic

Epidote

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

metamorphic

Serpentinite

Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4

metamorphic

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

mineral

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

mineral

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

mineral

Quartz (likely Herkimer Diamond style)

Silicon Dioxide (SiO2)

mineral

Gneiss (Metamorphic Rock)

Gneiss

metamorphic

Gneiss

Gneiss (High-grade Metamorphic Rock)

metamorphic

Orange Calcite

Calcium Carbonate (CaCO3)

mineral

Puddingstone

Conglomerate (specifically a type of jasper conglomerate or quartz conglomerate)

Sedimentary

Pink Granite

Phaneritic Felsic Igneous Rock (composed primarily of K-Feldspar, Quartz, and Plagioclase)

igneous

Pink Granite

Granite (Phaneritic Quartz-Feldspar Rock)

igneous

Serpentine Jade (New Jade/Olive Jade)

Serpentinite (a rock composed primarily of serpentine minerals) / Mg3Si2O5(OH)4 for Antigorite and Lizardite

Mineral

Pink Granite

Phaneritic Felsic Igneous Rock (Granite)

igneous

River Siltstone / Mudstone Pebble

Siltstone (composed of mixed silicate and carbonate minerals)

sedimentary

Lapis Lazuli

Lazurite-rich metamorphic rock (complex silicate)

metamorphic

Granite

Plutonic Igneous Rock (composed typically of SiO2, Al2O3, K2O, Na2O, CaO)

igneous

Labradorite (likely Black Labradorite or Larvikite)

Labradorite (Na,Ca)(Al,Si)4O8. If a rock, it is typically anorthosite, gabbro, or norite, or a variety of syenite called Larvikite if it is specifically from Larvik, Norway.

Mineral/Igneous Rock

Quartz

Quartz (SiO₂)

Mineral

Slate

Slate (foliated metamorphic rock)

metamorphic

Sandstone

Arenite (primarily SiO2)

sedimentary

Granite (specifically Rapakivi Granite)

Phaneritic Felsic Igneous Rock (Granite)

igneous

Sandstone

Arenite (primarily SiO2 with various cementing agents)

sedimentary

Banded Gneiss

Gneiss (High-grade Metamorphic Rock)

metamorphic

Moonstone

Adularia or Orthoclase (KAlSi3O8) or Albite (NaAlSi3O8), specifically with lamellar exsolution of albite and orthoclase.

mineral

Eclogite

Eclogite (composed primarily of Omphacite and Pyrope Garnet)

metamorphic

Gneiss

Gneiss (High-grade regional metamorphic rock)

metamorphic

Almandine Garnet in Schist

Almandine, Fe3Al2(SiO4)3

metamorphic

Serpentinite

Serpentinite (composed primarily of serpentine group minerals like lizardite, chrysotile, or antigorite; Mg3Si2O5(OH)4)

metamorphic

Quartzite

Quartzite (primarily composed of SiO O₂)

Sedimentary Rock

Gneiss

metamorphic

Sandstone (Ferruginous)

Arenite (composed primarily of SiO2 with Fe2O3 staining)

sedimentary

Sandstone (Quartzose Sandstone)

Arenite (SiO2 principal component)

sedimentary

Gneiss

Gneiss (High-grade metamorphic rock)

metamorphic

Milky Quartz

Silicon Dioxide (SiO2)

mineral

Nuummite

Nuummite (Orthoamphibole rock composed of Anthophyllite and Gedrite)

metamorphic

Granite with Mafic Inclusions

Granite (Phaneritic igneous rock composed of Quartz, Feldspar, and Mica)

igneous

Granite Gneiss

Gneiss (high-grade metamorphic rock)

metamorphic

Red Sandstone

Arenite (with Iron Oxide)

sedimentary

Unakite

Unakite (altered granitic rock)

metamorphic

Granite

Plutonic Igneous Rock (composed of Quartz, Alkali Feldspar, and Plagioclase)

igneous