Igneous Or Metamorphic

Smoky Quartz

Silicon Dioxide (SiO2)

Blue Calcite

Calcium Carbonate (CaCO3)

Orange Calcite

Calcium Carbonate (CaCO3)

Quartz (Small Fragment)

Silicon Dioxide (SiO2)

Smoky Quartz

Smoky Quartz (Silicon Dioxide, SiO2)

Tumbled Quartz (Snow Quartz)

Silicon Dioxide (SiO2)

Smoky Quartz

Silicon Dioxide (SiO2)

Greasy Quartz (likely carved Milky Quartz or Aventurine)

Silicon Dioxide (SiO2)

Smoky Quartz

Silicon Dioxide (SiO2)

Citrine

Silicon dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

White Quartz

Silicon Dioxide (SiO2)

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Smoky Quartz

Silicon Dioxide (SiO2)

Bornite

Bornite (Cu5FeS4)

Quartz (Citrine or Iron-Stained)

Silicon Dioxide (SiO2)

Quartz (Gravel Pebble)

Silicon Dioxide (SiO2)

Quartz (specifically Citrine or Iron-stained Quartz)

Silicon Dioxide (SiO2)

White quartz fragment (likely milky quartz)

Quartz, silicon dioxide (SiO₂)

Weathered quartz-rich pebble

Likely quartzite or granitic/granodioritic rock; exact identification is uncertain from the image

Mixed quartz gemstone bead bracelet

Quartz, silicon dioxide (SiO₂), in varieties including smoky quartz, amethyst, rutilated quartz, and possibly tourmalinated quartz

Milky quartz

Quartz (silicon dioxide, SiO₂)

Quartz (Milky or Cloudy variety)

Silicon Dioxide (SiO2)

Hematite (Iron Ore)

Hematite (Fe2O3)

Rounded weathered pebble, likely granite or granitic gneiss

Probable granitoid: quartz, feldspar, and dark mica/amphibole

Milky quartz (rough quartz fragment)

Quartz, silicon dioxide (SiO₂)

Amethyst

Silicon dioxide (SiO2) with iron impurities

Small faceted dark gemstone, possibly spinel or sapphire

Uncertain; candidates include MgAl₂O₄ spinel or corundum (Al₂O₃) sapphire

Milky quartz (likely)

Quartz, silicon dioxide (SiO₂)

Milky quartz fragment

Quartz (silicon dioxide, SiO₂)

Small polished or naturally worn stone, possibly quartz-bearing rock

Indeterminate from the blurred image; likely quartz (SiO₂) or a pale feldspar-rich fragment

Smoky Quartz

Silicon Dioxide (SiO2) with aluminum impurities

Chalcopyrite in Quartz (Gold Ore Matrix)

CuFeS2 (Chalcopyrite) with SiO2 (Quartz)

Quartz (Smoky/Milky variety)

Silicon Dioxide (SiO2)

Small weathered rock fragment

Indeterminate; possibly granitic or altered feldspathic material

Small quartz-rich rock fragment (tentative)

Likely quartz (SiO₂) with possible feldspar or carbonate inclusions

Tumbled white stone beads, likely marble or quartz

Undetermined; possibly marble (recrystallized calcite, CaCO₃) or milky quartz (SiO₂)

Quartz (River Pebble)

Silicon Dioxide (SiO2)

Rainbow Moonstone (White Labradorite)

Labradorite (White varieties with Schiller effect), (Na,Ca)(Al,Si)4O8

Likely milky quartz

Quartz (silicon dioxide, SiO₂)

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Prasiolite

Silicon Dioxide (SiO2)