Man Made Glass (Not A Natural Rock Or Mineral)

Milky and Smoky Quartz Cobble

Silicon Dioxide (SiO2)

Quartz (likely a macrocrystalline variety like milky quartz or smoky quartz, given the appearance in the image)

Quartz (SiO₂ - Silicon Dioxide)

Sea Glass (Uranium/Vaseline Glass variant)

Silicon Dioxide (SiO2) with trace Uranium Oxide (U3O8)

River Pebble Gravel

Hydrothermally modified Clastic Sediment (mainly Quartzite and Chert)

Dyed Agate

Silicon Dioxide (SiO2) with synthetic dyes

Citrine

SiO2 (Silicon Dioxide)

Red Cubic Zirconia (Simulated Garnet)

Zirconium Dioxide (ZrO2)

Granite

Granite (Silicic Intrusive Igneous Rock)

Lapis Lazuli

Lapis Lazuli (a rock type, not a single mineral, composed primarily of lazurite, calcite, and pyrite)

Smoky Quartz

Quartz (Silicon Dioxide), Formula: SiO2

Smoky Quartz

Silicon Dioxide (SiO2)

Smoky Quartz

Silicon Dioxide (SiO₂)

Shale (with minor calcite veining)

Clastic sedimentary rock (primarily clay minerals and quartz)

Turquoise

Hydrated phosphate of copper and aluminium: CuAl6(PO4)4(OH)8·4H2O

Pink Dyed Agate

Chalcedony (SiO2) with artificial dyes

Limonitic Iron Ore / Goethite

Hydrated Iron(III) oxide-hydroxide (primarily FeO(OH)·nH2O)

Citrine Geode Fragment

Citrine (Silicon Dioxide with Iron Impurities), SiO2

Sandstone (Wonderstone)

Silicified Sandstone / Orthoquartzite with Liesegang rings

Citrine

Quartz (SiO2) - variety Citrine

Blue Aventurine

Silicon Dioxide (SiO2) containing Dumortierite or Crocidolite inclusions

Sandstone

Arenite (SiO2 based)

Limonite (Iron Ore)

Hydrous Iron Oxide (goethite, lepidocrocite)

Red Sandstone

Arenite (with Iron Oxide)

Granite (Weathered)

Plutonic Igneous Rock (Granitic)

Pink Granite

Granite (Phaneritic Felsic Igneous Rock)

Chert (Jasper variety)

Silicon Dioxide (SiO2)

Hag Stone

Calcareous sedimentary rock (often Chert, Flint, or Limestone)

Red Sandstone

Clastic sedimentary rock (primarily SiO2 with Fe2O3)

Green Aventurine

Aventurine Quartz (SiO2 with Fuchsite inclusions)

Green Quartz (Aventurine)

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

Green Aventurine

Quartzite (variety Aventurine) with Fuchsite inclusions (K(Al,Cr)2(AlSi3O10)(OH)2)

Citrine

Silicon Dioxide (SiO2) with iron impurities

Diorite (River Pebble)

Intermediate plutonic igneous rock

Amber

Succinite (fossilized tree resin)

Diorite (Spotted or Dalmatian Stone effect)

Diorite (Intermediate Plutonic Rock)

Pink Granite

Phaneritic Felsic Intrusive Igneous Rock

Quartz (Smoky Quartz variant)

Silicon Dioxide (SiO2)

Green Aventurine

Silicon dioxide (SiO2) with inclusions of Fuchsite mica

Smoky Quartz

Silicon Dioxide (SiO2)

Green Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite mica

Sandstone (Cross-bedded Drill Core)

Clastic Sedimentary Rock (primarily SiO2)

Smoky Quartz

Silicon Dioxide (SiO2)