Mixed (Sedimentary, Igneous, And Metamorphic)

Clear Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz (Milky/Rose Quartz variety)

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Magnetite / Iron Ore (likely Hematite-Magnetite mix)

Magnetite (Fe3O4)

Quartz (Common or Milky)

Silicon Dioxide (SiO2)

Hematite

Iron(III) oxide (Fe2O3)

Pyrite

Iron Sulfide (FeS2)

Quartz Pebble

Silicon Dioxide (SiO2)

Clear Quartz (Tumbled)

Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Potassium Feldspar

Orthoclase (KAlSi3O8)

Clear Quartz Crystal

Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Quartz (Milky/Crystalline variety)

Silicon Dioxide (SiO2)

Quartz (Milky/Clear variety)

Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Pyrite

Iron Disulfide (FeS2)

Pyrite

Iron Sulfide (FeS2)

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Pyrite (Iron Pyrites)

Iron Sulfide (FeS2)

Quartz (Milky or White Quartz)

Silicon Dioxide (SiO2)

Chrysocolla Chalcedony

Hydrated Copper Phyllosilicate (Cu,Al)2H2Si2O5(OH)4 + SiO2

Gneiss

Gneiss (Metamorphic high-grade)

Gneiss

Foliated Metamorphic Rock

Schist

Metamorphic Rock (Schist)

Gneiss

Gneiss (Metamorphic rock)

Smoky Quartz (Tumbled/Water-worn Quartz)

Silicon Dioxide (SiO2)

Quartz (River Cobble)

Silicon Dioxide (SiO2)

Citrine Quartz

Silicon Dioxide (SiO₂) with iron impurities

Quartz (Water-worn Pebble)

Silicon Dioxide (SiO2)

Smoky Quartz

Silicon Dioxide (SiO2)

Smoky Quartz

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Citrine

Silicon Dioxide (SiO₂)

Yellow Quartz (Citrine or Iron-Stained Quartz)

Silicon Dioxide (SiO2)

Smoky Quartz

Quartz (Silicon Dioxide), Formula: SiO2

Citrine

Quartz (Silicon Dioxide - SiO2)

Smoky Quartz

Silicon Dioxide (SiO₂)

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Cloudy Quartz / Quartz Tumble

Silicon Dioxide (SiO2)