Organic Gemstone (Not A Rock Or Mineral In The Traditional Sense, But Bio Mineralized Material)

Epidote

Epidote - Ca2(Al,Fe)3(SiO4)3(OH)

Yellow Calcite

Calcium Carbonate (CaCO3)

Clear Quartz

Silicon Dioxide (SiO2)

Potassium Feldspar

Orthoclase (KAlSi3O8)

Labradorite in Matrix

(Ca, Na)(Al, Si)4O8 (Plagioclase Feldspar)

Carnelian

Carnelian (Silica, SiO2)

Smoky Quartz

Silicon Dioxide (SiO2) with aluminum impurities

Citrine Quartz

Silicon Dioxide (SiO2) with iron impurities

Yellow Quartz (Citrine Quartz Pebble)

Silicon Dioxide (SiO2)

Angelite

Anhydrite (Calcium Sulfate, CaSO4)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz (Yellow/Citrine variety)

Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Garnet (Almandine)

Almandine, Fe3Al2Si3O12

Diamond

Carbon (C)

Golden Quartz (Citrine or Iron-stained Quartz)

Silicon Dioxide (SiO2)

Citrine Quartz

Silicon Dioxide (SiO2)

Obsidian

Volcanic glass

Chert (Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Smoky Quartz

Crystalline Silicon Dioxide (SiO2)

Lepidolite

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

Smoky Quartz on Matrix

Crystalline Silicon Dioxide (SiO2)

Kimberlite

Kimberlite (Group I or II)

Quartz (Peach/Orange variety)

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Labradorite

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

Amethyst

SiO2 (Silicon Dioxide with iron impurities)

Quartz

Silicon Dioxide (SiO2)

Quartz (Smoky/Grey Variety)

Silicon Dioxide (SiO2)

Aquamarine (Beryl)

Beryllium aluminum silicate (Be3Al2Si6O18)

Quartz

Silicon Dioxide (SiO2)

Orange Calcite

Calcium Carbonate (CaCO3)

Quartz fragment

Silicon Dioxide (SiO2)

Botryoidal Hematite

Hematite (Iron(III) oxide, Fe2O3)

Magnetite (Iron Ore)

Magnetite (Fe3O4)

Pyrite

Iron Sulfide (FeS2)

Sodalite

Sodalite (Na8Al6Si6O24Cl2)

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)