Igneous, Sedimentary, And Metamorphic

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Red Garnet

Almandine Garnet (Fe3Al2(SiO4)3)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz (Milky/Common)

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz (Common or Milky Quartz)

Silicon Dioxide (SiO2)

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz (Milky or Common Quartz)

Silicon Dioxide (SiO2)

Yellow Calcite

Calcium Carbonate (CaCO3)

Optical Calcite (Iceland Spar)

Calcite (Calcium Carbonate, CaCO3)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Optical Calcite

Calcium Carbonate (CaCO3)

Quartz (Milky/Crystalline)

Quartz (Silicon Dioxide, SiO2)

Gold Nugget

Native Gold (Au)

White Quartz

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

Blue Apatite

Apatite (Calcium Phosphate) - Ca5(PO4)3(F,Cl,OH)

Clear Quartz Fragment

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Gneiss (Augen Gneiss)

Augen Gneiss

Gneiss

Gneiss

Gneiss

Gneiss

Gneiss

Gneiss (High-grade metamorphic rock)

Ruby in Zoisite

Zoisite with Corundum (Ca2Al3(SiO4)(Si2O7)O(OH) + Al2O3)

Ruby in Zoisite

Anyolite (Ruby in Zoisite)

Gneiss

Gneiss

River Stone (River Pebble)

River Stone (Composition: primarily Quartzite, Chalcedony, and silicate minerals)

Biotite Schist

Biotite-rich Schist

Gneiss

Gneiss

River Pebble (Gneiss/Schist mix)

Metamorphic rock aggregate

Epidote with Quartz

Ca2(Al,Fe)3(SiO4)3(OH) (Epidote) / SiO2 (Quartz)

Schist

Chlorite/Mica Schist

Quartz pebble

Silicon dioxide (SiO2)

Blue Calcite

Calcium Carbonate (CaCO3)

Garnet in Host Rock

Garnet Group (A3B2(SiO4)3)