Mineral, Often Found As A Rock (Metamorphic)

Quartz

Silicon Dioxide (SiO2)

Yellow Quartzite

Quartzite (SiO2)

Quartzite

Quartzite (primarily SiO2)

Red Quartzite

Quartzite (primarily SiO2)

Red Quartzite River Stone

Metamorphic Rock (composed mainly of Quartz, SiO2)

Yellow Quartzite

Quartzite (primarily SiO2)

Quartzite Pebble

Quartzite (primarily SiO2)

Rhodonite

Manganese Silicate (Mn, Fe, Mg, Ca)SiO3

Quartzite

Metamorphosed Quartz Sandstone (SiO2)

Fuchsite (Chrome Mica)

K(Al,Cr)2(AlSi3O10)(OH)2

Quartzite

Quartzite (primarily SiO2)

Garnet

Garnet Group (complex nesosilicates with general formula X3Y2(SiO4)3, where X can be Ca, Mg, Fe2+, Mn2+ and Y can be Al, Fe3+, Cr3+, V3+)

Gneiss

Gneiss (High-grade metamorphic rock)

Rhodonite

Manganese silicate (MnSiO3)

Quartzite

Quartzite (primarily SiO2)

Granitic Gneiss

Gneiss (high-grade metamorphic rock primarily of quartz, feldspar, and mica)

Serpentinite

Serpentinite (complex silicate minerals including Lizardite, Antigorite, and Chrysotile)

Black Star Diopside

Diopside (CaMgSi2O6) with asterism

Yooperlite (Sodalite-bearing Syenite)

Sodalite-rich Syenite (Na8(Al6Si6O24)Cl2)

Quartz Vein in Host Rock

Quartz (SiO2) in Mafic or Sedimentary Matrix

Banded Slate or Siltstone with Quartz/Calcite Veins

Protolith-derived Siltstone or Slate (varies based on degree of metamorphism)

Beach Quartzite Pebble

Quartzite (primarily SiO2)

Quartzite

Quartzite (SiO2)

Quartzite with Iron Hydroxide Staining

Quartzite (primarily SiO2) with Limonite/Goethite staining

Limonitic Quartzite

Metamorphosed sandstone with Limonite (FeO(OH)·nH2O) staining

Quartzite

Quartzite (primarily SiO2)

Quartzite

Quartzite (primarily SiO2)

Mixed collection of Quartz varieties, Chalcedony, and metamorphic pebbles

Mixed gemstones (primarily Silicon Dioxide - SiO2)

Dendritic Agate or Spotted Quartzite

Silicon Dioxide (SiO2) with inclusions

Almandine Garnet

Almandine (Fe3Al2(SiO4)3)

Quartzite

Quartzite (SiO2)

Quartzite

Quartzite (Primary mineral: Quartz, SiO2)

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) in matrix

Blue Apatite

Apatite (Group), Ca5(PO4)3(F,Cl,OH)

Quartzite Pebble (Beach Pebble)

Quartzite (primarily SiO2)

Green Banded Chert (Agate/Jasper)

Silicon Dioxide (SiO2) with trace impurities of Chlorite or Glauconite

Calcite

Calcite (Calcium Carbonate, CaCO3)

Quartzite

Quartzite (primarily SiO2)

Quartzite

Metamorphosed Quartz Sandstone (SiO2)

Quartzite

Quartzite (SiO2)

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with iron inclusions)

Quartzite

Quartzite (SiO2)