Sedimentary (Secondary Classification: Cryptocrystalline Quartz)

Druzzy Quartz on Matrix

Silicon Dioxide (SiO2)

Almandine Garnet in Matrix

Almandine, Fe3Al2(SiO4)3

Sandstone (Ferruginous)

Clastic Sedimentary Rock (Litharenite)

Quartz Geode

Silicon Dioxide (SiO2)

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Quartz-veined Schist (or Metasandstone)

Metamorphic Rock with Quartz Veining (SiO2)

Chert / Yellow Jasper

Silicon Dioxide (SiO2)

Yellow Quartzite Pebble

Quartzite (SiO2)

Sandstone (Quartzose)

Arenite (primarily SiO2)

Sandstone (with Iron Staining)

Clastic sedimentary rock (primarily SiO2 with Fe2O3 oxides)

Sandstone

Clastic Sedimentary Rock (composed primarily of Quartz, SiO2)

Conglomerate

Conglomerate (a clastic sedimentary rock)

Quartz Geode Fragment

Silicon Dioxide (SiO2)

Sandstone

Arenite (SiO2 primarily)

Ferruginous Sandstone (Gerrit)

Arenite with Iron Oxide cementation

Red Jasper

Jasper (SiO2 with Fe2O3 inclusions)

Chert / River Pebble

Silicon Dioxide (SiO2)

Sandstone (Quartzite Pebble)

Arenite (primarily SiO2)

Milky Quartz (Ferruginous variety)

Silicon Dioxide (SiO2)

Sandstone

Clastic sedimentary rock (primarily SiO2)

Sandstone (likely Calcareous or Quartz-rich)

Arenite (SiO2 based typically)

Sandstone

Clastic sedimentary rock (primarily SiO2)

Quartz (Clear/White)

Silicon Dioxide (SiO2)

Sandstone

Arenite (Sedimentary rock composed of sand-sized minerals or rock grains)

Quartz (Milky/Crystalline)

Quartz (Silicon Dioxide, SiO2)

Wishing Stone (Quartz-veined Siltstone or Graywacke)

Hydrothermal Quartz vein in matrix of SiO2 (Quartz) and Al2O3 (Clay minerals)

Quartz (Milky/Crystalline variety)

Silicon Dioxide (SiO2)

Granite Sand (Decomposed Granite)

Grus / Quartz-Feldspar Detritus

Jasper

Silicon dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Jasper (Yellow Jasper)

Silicon Dioxide (SiO2) with iron inclusions

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

Clear Quartz Cluster

Silicon Dioxide (SiO2)

Clear Quartz Crystal Cluster

Silicon Dioxide (SiO2)

Druzy Quartz Geode (Oco or Moroccan variety)

Silicon Dioxide (SiO2)

Green Aventurine

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

Gold Nugget

Native Gold (Au)

Green Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite mica

Amethyst

Amethyst (Silicon Dioxide - SiO2 with iron impurities)

Sandstone (Greywacke)

Clastic Sedimentary Rock (SiO2 with lithic fragments)

Granitic Sand

Detrital sediment (predominantly Quartz, Feldspar, and Mica)