Organic Mineraloid And Mineral

Sandstone

Arenite (SiO2 based)

Selenite (Satin Spar)

Gypsum (CaSO4·2H2O)

Pyrite

Iron Sulfide (FeS2)

Prehnite

Prehnite, Ca2Al(AlSi3O10)(OH)2

Pyrite

Iron Sulfide (FeS2)

Chrysocolla and Azurite in Matrix

Hydrated copper phyllosilicate (Chrysocolla - Cu2H2Si2O5(OH)4) and Copper carbonate (Azurite - Cu3(CO3)2(OH)2)

Diamond (in a gold setting)

Carbon (C)

Diamond (in a jewelry setting)

Diamond (Carbon, C)

Tanzanite

Blue Zoisite (Ca2Al3(SiO4)3(OH))

Sunstone

(Ca,Na)((Al,Si)2Si2)O8 (Plagioclase Feldspar)

Agate (or Quartz with Agate banding)

Silicon dioxide (SiO2)

Dragon Vein Agate (Dyed)

SiO2

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Gold Ore (Lode Gold)

Native Gold (Au) in Matrix

Tiger's Eye (Banded)

Pseudomorph of Quartz after Crocidolite (SiO2)

Diamond (in a gold ring)

Diamond (pure carbon, C)

Citrine

Silicon Dioxide (SiO2)

Amethyst (Agate/Chalcedony variety)

Silicon Dioxide (SiO2) with iron impurities

Chalcedony (Desert Rose or Botryoidal Chalcedony)

Silicon Dioxide (SiO2)

Cubic Zirconia

Zirconium dioxide (ZrO2)

Diamond

C (Carbon)

Gold Nugget

Native Gold (Au)

Mixed Gemstone Collection

SiO2 (Quartz varieties) and Biogenic CaCO3 (Nacre)

Black Pearl (Tahitian Style)

Calcium Carbonate (Aragonite) - CaCO3 with Conchiolin

Amethyst

SiO2 (Silicon Dioxide with Iron impurities)

Native Gold (in Jewelry)

Gold (Au)

Gold Nugget

Native Gold (Au)

Corundum (Ruby Variety)

Corundum (Al2O3)

Cloudy Quartz

Silicon Dioxide (SiO2)

Lapis Lazuli

Lapis Lazuli (Complex aggregate containing Lazurite (Na,Ca)8(AlSiO4)6(SO4,S,Cl)2)

Moqui Marble / Ironstone Concretion

Ironstone Concretion (Goethite/Hematite and Sandstone)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Chrysocolla

Hydrated copper silicate (Cu,Al)2H2Si2O5(OH)4·nH2O

Vanadinite

Vanadinite (Pb5(VO4)3Cl)

Botryoidal Hematite (Kidney Ore)

Iron(III) oxide (Fe2O3)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz with Iron Staining

Silicon Dioxide (SiO2) with Ferruginous Oxides

Milky Quartz

Silicon Dioxide (SiO2)

Blue Moss Agate

Silicon Dioxide (SiO2) with mineral inclusions

Hematite

Iron(III) oxide (Fe2O3)

Potassium Feldspar (Orthoclase)

Orthoclase (KAlSi3O8)