Sedimentary (Microcrystalline Quartz)

Quartz Geode

Silicon Dioxide (SiO2)

River Pebble (Likely Quartzite or Chert)

Quartzite (primarily SiO2)

White Quartz (Milky Quartz)

Quartz (Silicon Dioxide - SiO2)

Milky Quartz Geode or Druzy Quartz

Silicon Dioxide (SiO2)

Quartz

Quartz (SiO₂ - Silicon Dioxide)

Banded Agate

Cryptocrystalline Quartz (SiO2)

Carnelian

Cryptocrystalline Quartz (SiO2)

Agate

Cryptocrystalline Quartz (SiO2)

Purple Banded Agate

Cryptocrystalline Quartz (SiO2)

Limestone (Concretionary or Tufa)

Calcium Carbonate (CaCO3)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Puddingstone (Jasper-Conglomerate)

Conglomerate (Silicon Dioxide, SiO2 with impurities)

Red Jasper

Silicon Dioxide (SiO2) with Iron impurities

Greywacke

Lithic wacke (variety of Sandstone)

Quartz (vein quartz)

SiO2 (Silicon Dioxide)

Quartzite

Quartzite (mainly SiO2)

Dragon Vein Agate

Chalcedony (Quartz) - SiO2

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Dyed Pink Quartzite (Jadeite Simulant)

Silicon Dioxide (SiO2) with organic dye

Mica Schist with Quartz

Mica-Quartz Schist (Muscovite subclass)

Quartz / Common Opal

Silicon Dioxide (SiO2)

Quartzite Pebbles

Quartzite (SiO2)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Quartz (Milky or White Quartz)

Silicon Dioxide (SiO2)

Ferruginous Quartz (Iron-stained Quartz)

Silicon Dioxide (SiO2) with Hematite/Goethite inclusions

Sand (Construction Grade)

Unconsolidated siliciclastic sediment (primarily SiO2)

Quartz (Milky Quartz)

Quartz (SiO2 - Silicon Dioxide)

Agate

Silicon Dioxide (SiO2) - Variety of Chalcedony

Agate

Silicon Dioxide (SiO2)

Yellow Quartzite

Quartzite (SiO2 with iron oxide inclusions)

Quartz

Silicon Dioxide (SiO₂)

Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite

Quartz Geode/Druzy Quartz

Quartz (SiO₂)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Quartz (Milky or White Quartz)

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Quartz (Silicon Dioxide, SiO2)

Sand Grain (Silica/Quartz Grain)

Silicon Dioxide (SiO2)

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

Yellow Quartz (Citrine/Yellow Jasper)

Silicon Dioxide (SiO2)

Quartzite Pebble

Metamorphic Quartzite (SiO2)