Metamorphic, Likely Sedimentary With Quartz Veins

Milky Quartz

Silicon Dioxide (SiO2)

Chert (and/or Siltstone River Pebble)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Green Aventurine

Aventurine Quartz (SiO2 with inclusions of Fuchsite)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Massive Quartz (Yellow/Citrine variety)

Silicon Dioxide (SiO2)

Green Aventurine in Host Rock

SiO2 (Quartz with Fuchsite inclusions)

Sandstone (Greywacke)

Arenite / Wacke (Mainly SiO2 with various lithic fragments)

Chert (specifically a stream-worn Chert Nodule)

Sedimentary Cryptocrystalline Quartz (SiO2)

Sandstone (likely Quartzose Sandstone)

Arenite (composed primarily of SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Chert (Flint)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Quartzite (River Cobble)

Metamorphic Rock (composed predominantly of SiO2)

Dyed Blue Quartzite

SiO2 (Silicon Dioxide) with artificial colorants

Quartz crystal with Pyrite inclusions

Silicon Dioxide (SiO2) with Iron Sulfide (FeS2)

Smoky Quartz

Silicon Dioxide (SiO2)

River Rock (likely Quartzite or Chert)

Quartzite (primarily SiO2)

Citrine

SiO2 (Silicon Dioxide)

Sandstone with Quartz Veins

Arenite (primarily SiO2 with Fe2O3 staining)

Basalt with Quartz Veins

Basalt (complex silicate) with Quartz (SiO2) intrusions

Graphite

Graphite (C)

Chert Arrowhead (Projectile Point)

Microcrystalline Quartz (SiO2)

Dumortierite Quartz (Blue Quartz)

Al7BO3(SiO4)3O3 (Aluminum Boro-silicate included in Quartz)

Green Aventurine and Clear Quartz

Green Aventurine (Silicon Dioxide - SiO2 with Fuchsite inclusions); Clear Quartz (Silicon Dioxide - SiO2)

Orange Quartz

Silicon Dioxide (SiO2) with iron oxide inclusions

Sandstone (Weathered Pebble)

Arenite (SiO2 primarily)

Jasper with Quartz Veining

Silicon Dioxide (SiO2) - Opaque cryptocrystalline variety of Quartz

Quartz (Chert/Chunky Chalcedony)

Silicon Dioxide (SiO2)

Quartz

Quartz (SiO₂)

Milky Quartz

Silicon Dioxide (SiO2)

Chert (with Quartz Vein)

Chert (Siliceous sedimentary rock, predominantly Microcrystalline Quartz SiO2)

Quartzite

Quartzite (SiO2)

Quartz

Silicon Dioxide (SiO₂)

Chert Pebble (Yellow Jasper)

Microcrystalline Quartz (SiO2)

Blue Chalcedony

Chalcedony (Silicon Dioxide, SiO2)

Sandstone

Arenite (primarily SiO2)

Pyrite on Quartz (Fool's Gold in Quartz)

Iron Sulfide (FeS2) on Silicon Dioxide (SiO2)

Barite

Barium Sulfate (BaSO4)

Yellow Quartz / Citrine Quartz

Silicon Dioxide (SiO2)

Copper-bearing Quartz (likely Malachite on Quartz matrix)

Cu2CO3(OH)2 (Malachite) on SiO2 (Quartz)

Emerald in Matrix (Quartz/Schist)

Beryl (Be₃Al₂Si₆O₁₈) with Chromium/Vanadium impurities

Chert (Iron-stained)

Microcrystalline or Cryptocrystalline Quartz (SiO2)