Mineral (Gemstone Variety Of Beryl)

Amazonite

Potassium Feldspar (KAlSi3O8)

Amethyst

SiO2 (Silicon Dioxide with Iron impurities)

Prehnite

Ca2Al(AlSi3O10)(OH)2 (Calcium Aluminum Silicate hydroxide)

Citrine

Silicon Dioxide (SiO2) with iron impurities

Amazonite

Microcline (KAlSi3O8)

Amethyst

Silicon Dioxide with Iron impurities (SiO2)

Sodalite

Sodalite (Na8Al6Si6O24Cl2)

Carnelian

Carnelian Agate (Silica: SiO2)

Jasper

Silicon dioxide (SiO2) with impurities

Chert (Flint)

Silicon dioxide (SiO2)

Banded Gneiss (River Rock/Pebble)

Gneiss (specifically a banded variety often found as a river rock)

Sandstone (Quartzose)

Arenite (SiO2 principal)

Tumbled Stones (various)

Mixed Silica-based Minerals (primarily Quartz and Chalcedony)

Greenschist (Greenstone River Pebble)

Greenschist (Chlorite Schist)

Green Calcite

Calcium Carbonate (CaCO3)

Snowflake Obsidian

Spherulitic Volcanic Glass (primarily SiO2 with Cristobalite inclusions)

Diorite (Gneissic)

Diorite

Herkimer Diamond

Quartz (Silicon Dioxide) - SiO2

Rhodonite

Manganese Silicate (Mn,Fe,Mg,Ca)SiO3

Olivine in Basalt (Peridotite Xenolith)

Forsterite-rich Olivine (Mg2SiO4) in Aphanitic Basalt

Chrysocolla in Cuprite (Sonoran Sunrise)

Cu2-xAlx(H2-xSi2O5)(OH)4·n(H2O) (Chrysocolla) and Cu2O (Cuprite)

Peridot (Olivine)

(Mg,Fe)2SiO4 (Magnesium Iron Silicate)

Quartz (Clear Quartz)

Silicon Dioxide (SiO2)

Quartz (specifically Clear Quartz or Rock Crystal)

Silicon Dioxide (SiO2)

Turquoise

Hydrous phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)

Jasper

Jasper (Silicon Dioxide, SiO2)

Olivine in Basalt matrix

Olivine (Magnesium Iron Silicate - (Mg, Fe)2SiO4)

Carnelian

Chalcedony (Silicon Dioxide, SiO2 with Iron Oxide impurities)

Yellow Quartz (Citrine or Iron-Stained Quartz)

Silicon Dioxide (SiO2)

Turquoise

Turquoise (CuAl6(PO4)4(OH)8·4H2O)

Quartz (Double-Terminated)

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Carnelian

SiO2 (Microcrystalline Quartz / Chalcedony)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Moss Agate

Cryptocrystalline Quartz (SiO2 with Manganese or Iron Oxide inclusions)

Quartz

Silicon Dioxide (SiO2)

Labradorite

Labradorite ((Ca, Na)(Al, Si)4O8)

Yellow Quartz (Citrine or Quartzite Pebble)

Silicon Dioxide (SiO2)

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Quartz (Milky Variant)

Silicon Dioxide (SiO2)

Smoky Quartz

Silicon Dioxide (SiO2)