Metamorphic (Altered Igneous Rock)

Quartz / Quartzite

Quartz (Silicon Dioxide, SiO2)

Emerald with Matrix (Emerald in Mica Schist)

Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities

Quartzite

Quartzite (Primary mineral: SiO2)

Granite

Granite

Gneiss (Granitic Gneiss)

Gneiss

Granite Glacial Erratic

Intrusive Phaneritic Felsic Rock (Granite)

Dalmatian Stone

Peralkaline rhyolite with arfvedsonite (formerly incorrectly called Dalmatian Jasper)

Granite Pebble (River Rock)

Granite (composed primarily of Quartz, Feldspar, and Mica)

Granite Cobble

Granite (Phaneritic Quartz-Feldspar Felsic Rock)

Andesite Porphyry

Andesite (extrusive volcanic rock)

Quartzite

Quartzite (SiO2)

Tiger's Eye (likely Hawk's Eye variant)

Pseudomorph of Quartz after Crocidolite (SiO2)

Quartzite Pebble (River Rock)

Quartzite (mainly SiO2)

River Rock (Basalt)

Aphanitic Basaltic Rock

Quartz (Iron-Stained)

Silicon Dioxide (SiO2)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Strawberry Quartz

Quartz with Hematite or Goethite inclusions (SiO2 + inclusions)

Yellow Calcite

Calcium Carbonate (CaCO3)

Quartz / Clear Quartz

Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Ferruginous Quartz

Silicon Dioxide (SiO2) with Hematite/Limonite inclusions

Moonstone

Adularia / Orthoclase (KAlSi3O8)

Moonstone (Green Moonstone / Garnierite)

Potassium Aluminum Silicate (KAlSi3O8) with inclusions of Garnierite

Quartz

Silicon Dioxide (SiO2)

Quartz (Milky or Common Quartz)

Silicon Dioxide (SiO2)

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz (Milky/Common)

Silicon Dioxide (SiO2)

Smoky Quartz

Quartz (Silicon Dioxide) - SiO2

Smoky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Mixed Mineral Specimens

Mixed Silicates, Oxides, and Phosphates (SiO₂, Ca₅(PO₄)₃(F,Cl,OH), Na₈Al₆Si₆O₂₄Cl₂, etc.)

Quartz (Common or Milky Quartz)

Silicon Dioxide (SiO2)

Gold Nugget

Native Gold (Au)

Quartz (Milky/Crystalline)

Quartz (Silicon Dioxide, SiO2)

Peach Moonstone

Potassium Aluminum Silicate (KAlSi3O8)

Lemon Quartz (Orizaba/Citrinated Quartz)

Silicon Dioxide (SiO2) with iron impurities/treatment

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Peacock Ore

Bornite (Cu5FeS4) or iridescent Chalcopyrite (CuFeS2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)