Metamorphic Mineral

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Red Aventurine (Strawberry Quartz)

Silicon Dioxide (SiO2) with inclusions of Hematite or Goethite

Banded Agate

Cryptocrystalline Quartz (SiO2)

Rose Quartz

Silicon Dioxide (SiO2) with traces of Titanium, Iron, or Manganese

Feldspar (Orthoclase)

Potassium Feldspar (KAlSi3O8)

Plagioclase Feldspar

Plagioclase Feldspar Series (NaAlSi3O8 - CaAl2Si2O8)

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Red Garnet (Almandine-Pyrope series)

Garnet Group, Almandine (Fe3Al2(SiO4)3) or Pyrope (Mg3Al2(SiO4)3)

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Smoky Quartz

Silicon Dioxide (SiO2)

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Mica (Muscovite)

Potassium aluminum silicate - KAl2(AlSi3O10)(OH)2

Green Aventurine (Quartz)

SiO2 (Silicon Dioxide with Fuchsite inclusions)

Blue Calcite

Calcium Carbonate (CaCO3)

Yellow Aventurine

Quartzite with Muscovite/Goethite inclusions (SiO2)

Greenstone (Greenschist)

Greenschist (composed of Chlorite, Epidote, and Actinolite)

Tiger's Eye (often misinterpreted as Gold Ore in this context)

Pseudomorph of Quartz after Crocidolite (SiO2)

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Quartz (Milky/Iron-stained)

Silicon Dioxide (SiO2)

Quartzite (Yellow/Iron-stained Quartz)

Quartzite (primarily SiO2 with iron oxide impurities)

River Rock (Granitic Gneiss)

Foliated Granitic Gneiss

Quartzite Pebble (with Iron Inclusions)

Quartzite (primarily SiO2 with Fe2O3/FeOOH impurities)

Quartzite river pebble

Quartzite (SiO2)

Quartz / Quartzite

Silicon Dioxide (SiO2)

Quartz Crystal (Amethyst)

Silicon Dioxide (SiO2)

Ruby

Corundum (Al2O3)

Shale

Shale (comprised mostly of clay minerals and quartz)

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals: (Mg,Fe)3Si2O5(OH)4)

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with iron inclusions)

Amazonite

KAlSi3O8 (Potassium Aluminum Silicate)

Sunstone

Aventurine Feldspar ((Ca,Na)(Al,Si)4O8)

Tiger's Eye (Rough)

Macrocrystalline Quartz (SiO2 with inclusions of Crocidolite)

Banded Gneiss with Quartz Vein

Gneiss (High-grade Regional Metamorphic Rock)

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Ruby in Fuchsite

Corundum (Al2O3) in Chrome-Mica (KAl2(AlSi3O10)(OH)2)

Fulgurite

Fulgurite (Lechatelierite), amorphous SiO2

Tiger Iron

Tiger Iron (composite of Tiger's Eye, Red Jasper, and Hematite)

Fuchsite on Quartzite

Muscovite (Chromium-bearing) K(Al,Cr)2(AlSi3O10)(OH)2

Garnet-Bearing Gneiss

Almandine-Garnet Gneiss

Seraphinite

Clinochlore (Mg,Fe)5Al(AlSi3O10)(OH)8 - specific variety for Seraphinite due to its fibrous inclusions and chatoyancy.

Mica Schist

Muscovite/Biotite Schist