Metamorphic (Likely Gneiss Or Schist Based On Texture)

Gneiss (Green Gneiss)

Gneiss (High-grade Regional Metamorphic Rock)

Schist

Mica Schist

Foliated metamorphic rock, likely biotite schist

Mica schist, chiefly quartz, feldspar, and biotite mica

Gneiss (with Quartz and Mica)

Gneiss

Aquamarine

Beryl (Be3Al2(SiO3)6)

Muscovite Mica in Quartz Matrix

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

Biotite Mica in Host Rock

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

Biotite Schist

Biotite Schist

Gneiss

Gneiss

Micaceous schist (likely biotite schist)

Schist dominated by biotite mica, quartz, and feldspar

Schist

Mica Schist

Biotite / Black Mica

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

Gneiss

Foliated Metamorphic Rock (Gneiss)

Gneiss

Gneiss (High-grade metamorphic rock)

Kyanite (within Quartz)

Kyanite (Al2SiO5) in crystalline Quartz base (SiO2)

Garnet (likely Almandine, Pyrope, or a blend)

Garnet group minerals: X3Y2(SiO4)3, where X and Y represent various metal ions (e.g., Almandine: Fe3Al2(SiO4)3, Pyrope: Mg3Al2(SiO4)3)

Mica Schist

Mica Schist (varies based on mineral makeup, often Biotite/Muscovite schist)

Gneiss (Metamorphic Pebble)

Metamorphic Rock (Quartz-Feldspar-Biotite Gneiss)

Gneiss

Gneiss (High-grade metamorphic rock)

Quartz vein in weathered host rock

Milky quartz (SiO₂), likely in a granitic or metamorphic matrix

Gneiss

Gneiss (Metamorphic Rock)

Gneiss

Feldspar–quartz–mica gneiss, locally amphibole-bearing

Blue Kyanite

Kyanite (Al2SiO5)

Quartz-rich metamorphic rock (likely mica schist or gneiss)

Quartz–feldspar–mica assemblage; probable biotite schist/gneiss

Garnet in Matrix

Almandine or Spessartine Garnet in Quartz/Schist Matrix (X3Al2(SiO4)3)

Granite Gneiss

Granitoid Gneiss

Biotite Mica

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

Rough Garnet (Almandine)

Almandine Garnet (Fe3Al2(SiO4)3)

Corundum (Sapphire and Ruby)

Aluminum Oxide (Al2O3)

Banded Gneiss

Foliated Gneiss

Mica Schist with Garnet inclusions

Mica Schist (primarily Muscovite and Biotite - KAl2(AlSi3O10)(OH)2)

Gneiss

Gneiss

Black Tourmaline (Schorl)

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

Garnet (Polished)

Nesosilicate (Group formula: X3Y2(SiO4)3)

Granite Gneiss with Garnet

Garnetiferous Gneiss

Kyanite

Kyanite (Al2SiO5)

Milky Quartz with Mica (Gneiss/Schist influence)

Silicon Dioxide (SiO2) with Phyllosilicates

Gneiss

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

Biotite-bearing granite or granitic gneiss

Quartz–feldspar granite with biotite and accessory mica/amphibole

Banded Gneiss

Gneiss (Metamorphic rock of variable mineralogy, often quartz-feldspar base)

Blue Sapphire

Corundum (Al2O3)

Biotite (Black Mica)

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