Igneous, Sedimentary, And Metamorphic Mix

Gneiss

Gneiss (High-grade metamorphic rock)

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Clear Quartz (Tumbled)

Silicon Dioxide (SiO2)

Pyrite

Iron Sulfide (FeS2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Potassium Feldspar

Orthoclase (KAlSi3O8)

Quartz Pebble

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz (Milky/Rose Quartz variety)

Silicon Dioxide (SiO2)

Hematite

Iron(III) oxide (Fe2O3)

Quartz (Common or Milky)

Silicon Dioxide (SiO2)

Yellow Calcite

Calcium Carbonate (CaCO3)

Clear Quartz

Silicon Dioxide (SiO2)

Quartz (Milky/Crystalline variety)

Silicon Dioxide (SiO2)

Quartz (Milky/Clear variety)

Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Clear Quartz Crystal

Silicon Dioxide (SiO2)

Pyrite (Iron Pyrites)

Iron Sulfide (FeS2)

Quartz (Milky or White Quartz)

Silicon Dioxide (SiO2)

Pyrite

Iron Sulfide (FeS2)

Pyrite

Iron Disulfide (FeS2)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Opalite (Man-made Glass)

Synthetic Silicon Dioxide Glass (SiO2 + metal oxides)

Asphalt (Bituminous Concrete)

Composite material (bitumen binder with mineral aggregate)

Quartz

Quartz (SiO₂ - Silicon Dioxide)

Pyrite

Pyrite (Iron Disulfide), FeS2

River Pebble (Gneiss or Quartzite mixture)

Metamorphic rock (Commonly Gneissic)

Epidote

Epidote Group (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))

Magnetite (Iron Ore)

Magnetite (Fe3O4)

Calcite (commonly referred to as Orange Calcite or Honey Calcite given its color)

Calcite

Biotite Schist

Biotite Schist (K(Mg,Fe)3AlSi3O10(OH,F)2)

Gneiss

Gneiss (Metamorphic rock)

Pyrite

Iron Disulfide (FeS2)

Gneiss

Foliated Metamorphic Gneiss

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Yellow Calcite

Calcium Carbonate (CaCO3)

Clear Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)