Metamorphic (Low Grade)

Quartz (Milky/Bull Quartz)

Silicon Dioxide (SiO2)

Serpentinite (Serpentine Rock)

Primarily composed of serpentine group minerals, such as antigorite, chrysotile, and lizardite. Chemical formula for serpentine minerals is (Mg,Fe)3Si2O5(OH)4.

Dumortierite Quartz (Blue Quartz)

Al7(BO3)(SiO4)3O3 / Quarz with Dumortierite inclusions

Milky Quartz

Silicon Dioxide (SiO2)

Lapis Lazuli

Lapis Lazuli (Rock containing Lazurite, Calcite, and Pyrite)

Smoky Quartz

SiO2 (Silicon Dioxide)

Corundum (Sapphire in Host Rock)

Corundum (Aluminum Oxide, Al2O3)

Dumortierite Quartz (Blue Quartz)

Al7BO3(SiO4)3O3 (Aluminum Boro-silicate included in Quartz)

Biotite Mica

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

Optical Calcite (Iceland Spar)

Calcite (Calcium Carbonate, CaCO3)

Hypersthene

Hypersthene ((Mg,Fe)SiO₃)

Gneiss

Gneiss (Metamorphic rock of variable composition, typically SiO2 rich)

Quartz with Hematite Inclusions

Silicon Dioxide (SiO2) with Ferric Oxide (Fe2O3)

Smoky Quartz

Silicon Dioxide (SiO2)

Peacock Ore (Bornite or Iridescent Chalcopyrite)

Bornite (Cu5FeS4) or Chalcopyrite (CuFeS2) with tarnish

Black Star Diopside

Diopside (CaMgSi2O6) with asterism

Calcite

Calcite (CaCO₃, Calcium Carbonate)

Dumortierite Quartz

Al7(BO3)(SiO4)3O3

Quartzite Pebble

Metamorphosed Sandstone (SiO2)

Quartzite

SiO2 (Silicon Dioxide)

Gneiss

Gneiss (a metamorphic rock)

Sand (Construction Grade)

Unconsolidated siliciclastic sediment (primarily SiO2)

Schist

Schist (various compositions)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Magnetite (Iron Ore)

Magnetite (Fe3O4)

Clear Quartz / Rock Crystal

Silicon Dioxide (SiO2)

Biotite / Black Mica

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

Orange Quartzite (or Iron-Stained Quartz)

Silicon Dioxide (SiO2) with Iron Oxide impurities (Fe2O3)

Anthracite

Anthracite (Carbon-rich metamorphic coal)

Aquamarine

Beryl (Be3Al2Si6O18)

Prehnite

Prehnite (Ca2Al(AlSi3O10)(OH)2)

Garnet (Almandine)

Almandine Garnet (Fe3Al2(SiO4)3)

Jade (likely Nephrite or Jadeite)

Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2) or Jadeite (Na(Al,Fe3+)Si2O6)

Schist (Micaceous Schist)

Schist (comprising Muscovite/Biotite mica, Quartz, and Feldspar)

Anthracite Coal

Anthracite (high-rank coal)

Blue Apatite

Apatite (Calcium Phosphate) - Ca5(PO4)3(F,Cl,OH)

Moonstone

Potassium Aluminum Silicate (KAlSi3O8)

Clear Quartz

Silicon Dioxide (SiO2)

Yellow Agate

Agate (Varietal form of Chalcedony/Quartz, SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Chalcopyrite

Chalcopyrite (CuFeS2)

Chalcedony (Banded/Mottled Variety)

Chalcedony (a cryptocrystalline variety of Quartz, SiO2)