Metamorphic Mineral

Rainbow Moonstone with Black Tourmaline

White Labradorite (Feldspar variety, (Na,Ca)(Al,Si)4O8) with Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)

Aquamarine

Beryl (Be3Al2Si6O18)

Mixed Gemstone Beaded Jewelry

Various minerals (e.g., Quartz varieties like Rose Quartz, Amethyst; Peridot; Garnet; etc.)

Blue Calcite

Calcium Carbonate (CaCO3)

Iolite

Cordierite (Magnesium iron aluminium silicate)

Nephrite Jade

Ca2(Mg, Fe)5Si8O22(OH)2

Prehnite

Prehnite - Ca2Al(AlSi3O10)(OH)2

Pyrite on Quartz

Iron Sulfide (FeS2) on Silicon Dioxide (SiO2)

Amazonite

Microcline (KAlSi3O8) with lead impurities

Sunstone

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

Rutilated Quartz

Silicon Dioxide (SiO2) with Titanium Dioxide (TiO2) inclusions

Gneiss

Foliated Metamorphic Rock (Gneiss)

Tiger's Eye (Rough)

Pseudomorph of Quartz after Crocidolite (SiO2 with FeOOH inclusions)

Ruby in Fuchsite (often sold as Ruby in Zoisite)

Corundum (Al2O3) in Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)

Aventurine Quartz

Silicon Dioxide (SiO2) with Fuchsite inclusions

Orthoclase Feldspar

Orthoclase (KAlSi3O8)

Gneiss (Banded Gneiss)

Gneiss

Banded Gneiss

Gneiss (High-grade regional metamorphic rock)

Tiger's Eye (Rough)

Pseudomorph of Quartz after Crocidolite (SiO2 with iron inclusions)

Quartz

Quartz (SiO2 - Silicon Dioxide)

Quartz Vein in Host Rock (Likely Slate or Shale)

Hydrothermal Quartz (SiO2) in Pelitic host rock

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with Iron inclusions)

Tiger's Eye

Pseudomorph of quartz after crocidolite (SiO2)

Marble

Recrystallized Calcite (CaCO3)

Quartzite

Quartzite (SiO2)

Quartzite

Quartzite (primarily SiO2)

Gneiss (specifically Micaceous Gneiss)

Gneiss (High-grade Regional Metamorphic Rock)

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxides)

Amethyst (Polished/Carved Crystal)

Silicon Dioxide (SiO2) with trace Iron (Fe)

Quartzite with Calcite Accretion

Metamorphosed Quartz Sandstone (SiO2 with CaCO3 coating)

Green Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite mica

Green Aventurine

Quartzite with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)

Quartz (Citrine or Iron-Stained)

Silicon Dioxide (SiO2)

Quartz (Common or Milky)

Silicon Dioxide (SiO2)

Banded Gneiss

Gneiss (High-grade regional metamorphic rock)

Soapstone / Steatite

Steatite (primarily Talc, Mg3Si4O10(OH)2)

Pyrite (on Quartz/Host Rock)

Iron Sulfide (FeS₂)

Blue Quartz (Dumortierite Quartz)

SiO2 containing inclusions of Dumortierite [Al7(BO3)(SiO4)3O3]

Schist

Schist (primarily mica-schist)

Red Aventurine

Aventurine Quartz (SiO2 + Hematite/Goethite)

Granite Gneiss

Gneiss (High-grade metamorphic rock)