Metamorphic

Citrine Quartz

Silicon Dioxide (SiO2) with iron impurities

Citrine Quartz

Silicon Dioxide (SiO2) with iron impurities

Smoky Quartz

Silicon Dioxide (SiO2)

Quartz in Matrix

Silicon Dioxide (SiO2)

Amethyst and Ruby in Zoisite

Silicon Dioxide (SiO2) and Anyolite (Zoisite-Hornblende-Ruby mix)

Hematite

Iron(III) oxide (Fe2O3)

Agate

Agate (Silicon Dioxide, SiO2)

Peacock Ore (Chalcopyrite)

Chalcopyrite (CuFeS2)

Chalcopyrite

Copper Iron Sulfide (CuFeS2)

Blue Calcite

Calcite (CaCO3)

Clear Quartz Crystal

Quartz (Silicon Dioxide - SiO2)

Quartz with inclusions (likely Tourmaline or Biotite)

Silicon Dioxide (SiO2)

Rough Citrine Quartz

Silicon Dioxide (SiO2) with ferric iron impurities

Orthoclase Feldspar

Orthoclase (KAlSi3O8)

Chrysoberyl (Cyclic Twin)

Beryllium Aluminum Oxide (BeAl2O4)

Green Calcite

Calcium Carbonate (CaCO3)

Aquamarine

Beryl (Be3Al2Si6O18)

Pyrite

Iron Sulfide (FeS2)

Biotite (Black Mica)

Biotite (K(Mg,Fe)3AlSi3O10(OH)2)

Muscovite Schist

Muscovite Mica Schist (KAl2(AlSi3O10)(OH)2)

Nuummite

Nuummite (Ortho-amphibole rock, primarily Anthophyllite and Gedrite)

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxide inclusions)

Green Aventurine

Silicon Dioxide (Quartz with Fuchsite inclusions), SiO2

Jadeite Jade

NaAlSi2O6 (Sodium Aluminum Silicate)

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals: (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4)

Lapis Lazuli

Lapis lazuli (a metamorphic rock primarily composed of Lazurite, (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Lapis Lazuli

Lapis Lazuli (A metamorphic rock primarily composed of Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Quartz (Clear Quartz)

Silicon Dioxide (SiO2)

Milky Quartz Pebbles

Silicon Dioxide (SiO2)

Orange Calcite

Calcium Carbonate (CaCO3)

Clear Quartz (Rock Crystal)

Quartz (Silicon Dioxide, SiO2)

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Rough Green Sapphire (Corundum)

Corundum (Al2O3 - Aluminum Oxide with trace elements)

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Citrine Quartz

Silicon Dioxide (SiO2)

Labradorite (Carved)

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

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

White Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Peacock Ore (Bornite or Chalcopyrite treated with acid)

Bornite (Cu5FeS4) or Acid-washed Chalcopyrite (CuFeS2)

Smoky Quartz (Rough Specimen)

Silicon Dioxide (SiO2)

Mixed Tumbled Gemstones and River Rocks

Mixed Decorative Stones (predominantly Silicon Dioxide - SiO2 variants)