Mineral Simulant (Synthetic Glass)

Quartzite (Yellow/Iron-stained Quartz)

Quartzite (primarily SiO2 with iron oxide impurities)

Milky Quartz

Silicon Dioxide (SiO2)

Amethyst (Chevron or Banded Amethyst)

Silicon Dioxide (SiO2) with Fe3+ impurities

Granite

Phaneritic Felsic Igneous Rock

Quartzite Pebble

Quartzite (primarily SiO2)

Sandstone

Arenite (primarily SiO2 - Silicon Dioxide)

Sandstone (likely Arkosic)

Clastic Sedimentary Rock (primarily SiO2 with Feldspar)

Sandstone (likely Quartzose Sandstone)

Arenite (SiO2 predominantly)

Sandstone

Arenite (primarily SiO2)

Sandstone

Arenite (primarily SiO2)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Lepidolite

Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)

Milky Quartz

Silicon Dioxide (SiO2)

Muscovite (Mica)

Muscovite - KAl2(AlSi3O10)(OH)2

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2)

White Quartz (Milky Quartz Pebble)

Silicon Dioxide (SiO2)

Pink Feldspar

Orthoclase (KAlSi3O8) or Microcline

Orange Calcite

Calcium Carbonate (CaCO3)

Quartz with Chalcopyrite and Pyrite

Silicon Dioxide (SiO2) with Copper Iron Sulfide (CuFeS2)

Milky Quartz

Silicon Dioxide (SiO2)

Lepidolite on Matrix

K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2

Kunzite (Spodumene)

Spodumene (LiAlSi2O6)

Quartz (River Pebble)

Silicon Dioxide (SiO2)

White Quartz Pebble (Milky Quartz)

Silicon Dioxide (SiO2)

Sandstone (Ferruginous)

Clastic sedimentary rock (primarily SiO2 with Fe2O3 cement)

White Quartz Pebble

Silicon Dioxide (SiO2)

Milky Quartz

Crystalline Silicon Dioxide (SiO2)

Clear Quartz (Druzy/Crystal Cluster)

Silicon Dioxide (SiO2)

Smoky Quartz (Tumbled)

Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Smoky Quartz Cluster

Quartz (Silicon Dioxide) - SiO2

Dream Amethyst (Chevron Amethyst)

Silicon Dioxide (SiO2) with impurities of Iron (Fe3+)

Black Freshwater Pearls

Biogenic Calcium Carbonate (Aragonite/Calcite), CaCO3

Quartz (Chert/Chalcedony Variety)

Silicon Dioxide (SiO2)

Quartz (Smoky/Milky variant)

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Fluorite (Purple Octahedron)

Calcium Fluoride (CaF2)

Black Star Diopside

Diopside (CaMgSi2O6) with Magnetite inclusions

White Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Milky Quartz with Epidote or Chlorite inclusions

Silicon Dioxide (SiO2) with inclusions of Epidote {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)

Milk Quartz (Vein Quartz)

Quartz (Silicon Dioxide, SiO2)