Sedimentary And Igneous

Chalcopyrite

Copper Iron Sulfide (CuFeS2)

Clear Quartz Crystal

Silicon Dioxide (SiO2)

Agate

Silicon Dioxide (Chalcedony), SiO2

Agate

Chalcedony (SiO2)

White Quartz

Silicon Dioxide (SiO2)

White Quartz Beads

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz pebble

SiO2

Tumbled Clear Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz (Pink/Rose Quartz or Quartz Crystal)

Silicon Dioxide (SiO2)

White Quartz

Silicon Dioxide (SiO2)

Iceland Spar (Optical Calcite)

Calcite (CaCO3)

Agate

Silicon dioxide (chalcedony), SiO2

Quartz

Silicon Dioxide (SiO2)

Pyrite

Iron Sulfide (FeS2)

Carnelian

Carnelian (SiO2)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Quartz (Milky/Crystalline fragment)

Silicon Dioxide (SiO2)

Pyrite and Sunstone

Iron Sulfide (FeS2) and Plagioclase Feldspar ((Ca,Na)Al(Al,Si)Si2O8)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Yellow Calcite

Calcium Carbonate (CaCO3)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

White Quartz (Milky Quartz)

Quartz (Silicon Dioxide - SiO2)

Quartz on Matrix

Silicon Dioxide (SiO2)

Quartz pebble

Silicon dioxide (SiO2)

Dalmatian Stone (commonly Dyed)

Dalmatian Jasper (Peralkaline igneous rock)

Quartz and Unakite

SiO2 (Quartz) / Epidote, Pink Orthoclase, Quartz (Unakite)

Quartz pebble with iron staining

Silicon dioxide (SiO2) with iron oxide impurities

Carnelian Agate

Silicon Dioxide (SiO2) with iron oxide inclusions

Grey Banded Agate

Silicon Dioxide (SiO2)

Magnetite or Hematite Nodule

Iron Oxide (Fe3O4 or Fe2O3)

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Milky Quartz

Silicon Dioxide (SiO2)

Massive White Quartz

Silicon Dioxide (SiO2)

Epidote with Quartz Vein

Epidote-bearing metamorphic rock with quartz (Ca2(Al,Fe)3(SiO4)3(OH))

Yellow Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Orange Quartz / Peach Aventurine

Silicon Dioxide (SiO2)

Magnetite / Lodestone

Magnetite (Fe3O4)

Pyrite

Iron Sulfide (FeS2)