Sedimentary And Igneous

Blue apatite (likely dyed or enhanced)

Apatite group; fluorapatite, Ca5(PO4)3F, is the common blue variety

Pyrite in Matrix

Iron Sulfide (FeS2)

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Clear Quartz

Silicon Dioxide (SiO2)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

K-Feldspar (Potassium Feldspar)

Orthoclase / Microcline (KAlSi3O8)

Quartz

Silicon Dioxide (SiO2)

Tumbled White Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Calcite (with iron oxide staining)

Calcium Carbonate (CaCO3)

Glacial Erratic Boulder (Sandstone / Granite)

Glacial Erratic / Sandstone (SiO2 dominated)

Epidote with Quartz

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

Amethyst and Calcite collection

Silicon Dioxide (SiO2) and Calcium Carbonate (CaCO3)

Pyrite (Tumbled)

Iron Disulfide (FeS2)

Yellow Chalcedony (likely Carnelian or Agate)

Silicon dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Pyrite

Iron Sulfide (FeS2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz (Iron-stained Quartz)

Silicon Dioxide (SiO2)

Quartz

SiO2

Quartz

Silicon Dioxide (SiO2)

Yellow Agate

Silicon Dioxide (SiO2)

Quartz crystals on matrix

Silicon dioxide (SiO2)

Sulemani Hakik (Eye Agate)

Chalcedony (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

White Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz (Iron-Stained)

Silicon Dioxide (SiO2)

Colorless Quartz (Rhinestone)

Silicon Dioxide (SiO2)

White Chalcedony (Agate)

Silicon Dioxide (SiO2)

Quartz (Pale Rose or Milky Variety)

Silicon Dioxide (SiO2)

Graphite

Graphite (C)

Quartz (Milky/Common)

Silicon Dioxide (SiO2)

Pyrite

Iron Disulfide (FeS2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)