Industrial Byproduct (Often Confused With Igneous Rocks Or Meteorites)

Quartzite River Rock

Quartzite (SiO2)

Sandstone

Arenite (composed primarily of Quartz: SiO2)

Sunstone

Feldspar group (Plagioclase / Oligoclase)

Garnet (Almandine)

Almandine (Fe3Al2(SiO4)3)

Quartzite

Quartzite (SiO2)

Gneiss

Gneiss (High-grade metamorphic rock)

Sandstone with Algae Growth

Arenite with Chlorophyta/Lichen

Pyrite

Iron Sulfide (FeS2)

Sodalite

Na8(Al6Si6O24)Cl2

Zircon

Zircon (ZrSiO4)

Quartzite River Pebbles

Quartzite (primarily SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz Vein / Quartzite with Iron Oxide Staining

Silicon Dioxide (SiO2)

Quartz pebble

Silicon dioxide (SiO2)

Banded Agate

Silicon Dioxide (SiO2)

Hematite

Iron(III) oxide (Fe2O3)

Gneiss

Gneiss (Metamorphic Rock)

Garnet Gneiss

Gneiss containing Almandine Garnet

Quartz (partially iron-stained)

Silicon Dioxide (SiO2)

Citrine Quartz (Raw)

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Orange Calcite

Calcium Carbonate (CaCO3)

Yellow Chalcedony (common opal or chert variant)

Silicon Dioxide (SiO2)

Rose Quartz

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

Gneiss

Gneiss (High-grade Metamorphic Rock)

Gneiss

Gneiss

Yellow Calcite

Calcium Carbonate (CaCO3)

Optical Calcite (Iceland Spar)

Calcite (Calcium Carbonate, CaCO3)

Arfvedsonite in Quartz (also labeled as Astrophyllite or Nuummite by collectors)

[Na][Na2][Mg4Fe2+](Si8O22)(OH)2 in SiO2

Optical Calcite

Calcium Carbonate (CaCO3)

Yellow Quartz (Citrine Quartzite)

Silicon Dioxide (SiO2)

Labradorite

Labradorite ((Ca, Na)(Al, Si)4O8)

Smoky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Orange Calcite

Calcium Carbonate (CaCO3)

Yellow Chalcedony (Agate)

Silicon Dioxide (SiO2)

Gneiss

Gneiss (High-grade Metamorphic Rock)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz (Agate or Chert pebble)

Silicon Dioxide (SiO2)

Pyrite

Iron Sulfide (FeS2)