Metamorphic Rock (Variety Of Quartz)

Quartz (Milky/Gravel variety)

Silicon Dioxide (SiO2)

Tiger's Eye (Rough)

Pseudomorph of Quartz after Crocidolite (SiO2)

Garnet (almandine or pyrope variety)

Silicate mineral Group: (Fe, Mg, Mn, Ca)3(Al, Fe, Cr)2(SiO4)3

Serpentinite

Serpentinite (a rock composed predominantly of serpentine group minerals)

Jasper

Jasper (Cryptocrystalline Quartz; SiO2)

Red Agate

Agate (Cryptocrystalline variety of Quartz, SiO2)

Tiger's Eye

SiO2 (Pseudomorph of Quartz after Crocidolite)

Blue Quartzite (Dyed)

Silicon Dioxide (SiO2) with inclusions

Serpentinite

Serpentinite (group of hydrous magnesium iron phyllosilicates)

Chert (Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Gneiss

Foliated Metamorphic Rock (Gneiss)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Red Jasper

Jasper (Silicon Dioxide, SiO2)

Quartz Crystal

Quartz (SiO₂)

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Quartzite (River Pebble)

Quartzite (composed primarily of Silica, SiO2)

Granitic Gneiss

Gneiss (Metamorphic rock of granitic composition)

Granite Gneiss

Gneiss (high-grade metamorphic rock)

Banded Gneiss (with Quartz Vein)

Gneiss (Metamorphic rock of varying mineralogy)

Quartzite Pebble (Beach Pebble)

Quartzite (primarily SiO2)

Red Quartzite

Quartzite (primarily SiO2)

Red Sandstone

Sandstone (principally Quartz with Iron Oxide coating)

Quartz / Calcite Vein Rock

Silicon Dioxide (SiO2) or Calcium Carbonate (CaCO3)

Chert / Flint

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Rough Sapphire (Corundum)

Corundum (Al2O3)

Rose Quartz

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

Quartz Crystal

Silicon Dioxide (SiO2)

Orange Quartzite (River Pebble)

Quartzite (primarily SiO2)

Dyed Agate Geode (Pink/Magenta)

Silicon Dioxide (SiO2) - variety of Chalcedony/Quartz

Smoky Quartz (with possible Garnet inclusions)

Silicon Dioxide (SiO2)

Quartzite (River Stone)

Quartzite

Quartz Vein in Host Rock

Silicon Dioxide (SiO2)

Yellow Quartz (Iron-Stained Quartz)

Silicon Dioxide (SiO2) with iron oxide inclusions

Quartzite River Rock

Quartzite (primarily SiO2)

Quartzite (Yellow/Tan Quartz Cobble)

Metamorphosed Quartz Sandstone (SiO2)

Chert (Flint)

Microcrystalline quartz (SiO2)

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Emerald with Matrix (Emerald in Mica Schist)

Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities

Tiger's Eye (Blue/Black variety, also known as Hawk's Eye)

Silicified Crocidolite (Silicon Dioxide with inclusions, SiO2)

Quartzite

Quartzite (Primary mineral: Quartz, SiO2)

Quartzite

Quartzite (primarily SiO2)

Quartz / Quartzite

Quartzite (primarily Silicon Dioxide, SiO2)