Mineral (Synthetic Glass)

Milky Quartz with Iron Inclusions

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Pink Feldspar

Orthoclase (KAlSi3O8)

Milky Quartz

Silicon Dioxide (SiO2)

Sandstone Cobble

Arenite (primarily SiO2)

Sandstone

Arenite (primarily SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz Crystal Point

Silicon Dioxide (SiO2)

Quartz (Milky/Crystalline variety)

Silicon Dioxide (SiO2)

Pyrite

Iron Disulfide (FeS2)

Massive White Quartz

Silicon Dioxide (SiO2)

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

Quartz

Silicon Dioxide (SiO2)

Yellow Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon dioxide (SiO2)

Quartz Crystal Cluster in Matrix

Silicon Dioxide (SiO2)

Apatite

Fluorapatite (Ca5(PO4)3F)

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Quartz fragment (Pebble)

Silicon Dioxide (SiO2)

White Quartz

Silicon Dioxide (SiO2)

Rose Quartz

SiO2 (Silicon Dioxide)

Green Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)

Quartzite

Quartzite (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Black Obsidian

Volcanic Glass (predominantly SiO2, Silicon Dioxide)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz Crystal Point

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Banded Chert

Microcrystalline Quartz (SiO2)

Quartzite

Hydrothermal Quartz or Quartzite (SiO2)

Ferruginous Quartz

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions

Milky Quartz (Vein Quartz)

Silicon Dioxide (SiO2)

Sandstone Cobble

Arenite (primarily Quartz Arenite)

Sandstone

Arenite (specifically Iron-stained Quartz Sandstone)

Sandstone (Quartz Arenite)

Sandstone (dominated by SiO2 quartz grains)

Quartz Pebble

Silicon Dioxide (SiO2)