Mineral (Cryptocrystalline Quartz)

Chert (Quartz Variety)

Microcrystalline Silica (SiO2)

Milky Quartz with Iron Inclusions

Silicon Dioxide (SiO2)

Quartz (Milky and Smoky variety)

Silicon Dioxide (SiO2)

Quartz Vein on Matrix

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

Iron-stained Quartz

Silicon Dioxide (SiO2) with Hematite/Limonite impurities

Milky Quartz

Silicon Dioxide (SiO2)

Clear Quartz Crystal

Quartz (Silicon Dioxide, SiO2)

Quartz (Engineered Stone Countertop)

Silicon Dioxide (SiO2) within a resin matrix

Chert (Jasper/Jasperoid)

Chert (chemically precipitated microcrystalline Quartz, SiO2)

Quartz

Quartz (SiO2 - Silicon Dioxide)

Milky Quartz with Chlorite/Mica inclusions

Silicon Dioxide (SiO2) with inclusions

Milky Quartz

Silicon Dioxide (SiO2)

Quartz vein in metamorphic rock

Crystalline Silicon Dioxide (SiO2) in Host Rock

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Quartz (Silicon Dioxide, SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Quartz Vein in Host Rock (Breccia/Rhyolite)

Silicon Dioxide (SiO2) with matrix

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Quartz Vein with Iron Staining

Silicon Dioxide (SiO2) with limonite/hematite staining

Quartz (Milky or Grainy Variety)

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Ferruginous Quartz

Silicon Dioxide (SiO2) with Limonite/Hematite inclusions

Blue Quartzite (Aventurine variety)

Silicon Dioxide (SiO2) with inclusions of Dumortierite or Magnesio-riebeckite

Amethyst

Silicon Dioxide (SiO2 with iron impurities)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Quartz Vein in Schist

Quartz (SiO2) in Mica Schist

Chert (includes Flint & Jasper)

Chert (Siliceous sedimentary rock, chemical formula SiO2)

Quartz with Muscovite Mica

Silicon Dioxide (SiO2) with Potassium Aluminum Silicate Hydroxide Fluoride (KAl2(AlSi3O10)(F,OH)2)

Quartz (milky variety)

SiO2 (Silicon Dioxide)

Gold-bearing Quartz with Pyrite

Quartz (SiO2) with Gold (Au) and Pyrite (FeS2)

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Quartzite

Quartzite (SiO2)

Ferruginous Quartz

Silicon Dioxide with Iron Oxide (SiO2 + Fe2O3)

Quartz (Smoky/Grey Variety)

Silicon Dioxide (SiO2)

Blue Chalcedony

Silicon Dioxide (SiO2)

Red Jasper

Jasper (Silicon Dioxide: SiO2 with Iron oxide inclusions)

Quartz

Quartz (SiO₂)

Jasper (Iron-stained Quartz)

Silicon dioxide (SiO2) with iron oxide inclusions