Mineral In Metamorphic Rock

Banded Gneiss

Gneiss (Metamorphic Rock)

Milky Quartz

Silicon Dioxide (SiO2)

Pyrite

Iron Disulfide (FeS2)

Black Tourmaline (Tumbled)

Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH)4)

Green Quartz (Prasiolite/Adventurine)

Silicon Dioxide with inclusions (SiO2)

Foliated Gneiss

Gneiss (Metamorphic Rock)

Veined Pebble (Quartz/Calcite Veined Metamorphic/Sedimentary Rock)

Quartz / Calcite Veined Fault Breccia or Metamorphic Pebble

Garnet Amphibolite (or Garnet Gneiss)

Garnet amphibolite / Garnet-bearing metamorphic rock

Quartz Vein in Greenstone

Hydrothermal Quartz (SiO2) with Chlorite/Epidote Schist host rock

Schist (Oxidized)

Mica Schist with Iron Oxide staining

Banded metamorphic rock, likely mica schist or gneiss

Quartz–feldspar–mica schist/gneiss; exact identification requires a fresh surface and mineral tests

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Quartz-veined Metamorphic Rock

Quartz Vein in Phyllite or Schist (SiO2 in Silicate Matrix)

Lapis Lazuli

Lapis Lazuli (Primary mineral: Lazurite, (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Quartz-rich metamorphic rock, likely quartzite

Quartzite; predominantly quartz (SiO₂) with iron-oxide staining and minor feldspar/mica

Eclogite

Eclogite (Omphacite + Pyrope)

Epidosite (Unakite-related)

Epidosite (composed primarily of Epidote and Quartz)

Gneiss

Gneiss (High-grade metamorphic rock)

Moonstone

Orthoclase (Potassium Aluminum Silicate), Formula: (K,Na)AlSi3O8

Quartz (Orange/Pink variety)

Silicon Dioxide (SiO2)

Soapstone (Talc Steatite) Carving

Steatite (Hydrous magnesium silicate, Mg3Si4O10(OH)2)

Schist

Mica Schist (Medium-grade Metamorphic Rock)

Gneiss

Gneissic Metamorphic Rock (Mineral composition: Quartz, Feldspar, Amphibole/Biotite)

Slate

Slate (Metamorphic Rock)

Banded Gneiss

Gneiss (High-grade regional metamorphic rock)

Rounded gray metamorphic rock, likely quartzite or gneiss

Quartz-rich metamorphic rock; exact identification is uncertain from the photograph

Quartz with Host Rock

Silicon Dioxide (SiO2)

Pyrite

Iron Sulfide (FeS2)

Aventurine

Aventurine Quartz (SiO2 with inclusions)

Quartz-rich metamorphic rock, likely quartzite

Quartzite; predominantly microcrystalline to granular SiO₂, possibly with mica and feldspar

Green Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite mica

Quartz (Smoky/Granular variety)

Silicon Dioxide (SiO2)

Slate

Slate (Metamorphic rock)

Garnet in Schist or Pegmatite

Almandine Garnet (Fe3Al2(SiO4)3) in host rock

Quartz Vein in Matrix (Gneiss/Schist)

Silicon Dioxide (SiO2) in Metamorphic Rock Matrix

Epidote-bearing Rock

Epidote / Silicate mineral aggregate

Banded Gneiss

Gneiss (Foliated Metamorphic Rock)

Gneiss

Gneiss (Metamorphic Rock)

Gneiss (Pebble)

Gneiss

Gneiss

Gneiss (High-grade regional metamorphic rock)

Banded Gneiss

Metamorphic Gneiss

Gneiss

Banded Metamorphic Rock (Gneiss)