Man Made Material (Jewelry, Metal Alloy)

Olivine (Peridot)

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

Coal (Bituminous or Anthracite)

Carbonaceous sedimentary rock (primarily Carbon, C)

Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Hematite

Iron(III) oxide (Fe2O3)

Rhodonite

Rhodonite (Mn,Fe,Mg,Ca)SiO3

Gold

Native Gold (Au)

Gold Nugget

Native Gold (Au)

Gold Nugget

Native Gold (Au)

Gold

Native Gold (Au)

Yellow Jade

Jadeite or Nephrite (NaAlSi2O6 or Ca2(Mg,Fe)5Si8O22(OH)2)

Labradorite (Larvikite variety)

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

Specular Hematite

Hematite (Fe2O3)

Green Aventurine

Silicon Dioxide (SiO2) with inclusions

Diamond (in jewelry)

Diamond (Carbon, C)

Green Adventurine

SiO2 (Silicon Dioxide with inclusions of Fuchsite mica)

Pyrite in Quartz

Iron Sulfide (FeS2) on Silicon Dioxide (SiO2)

Orthoclase Feldspar

KAlSi3O8 (Potassium Aluminum Silicate)

Potassium Feldspar

Orthoclase (KAlSi3O8)

Sunstone

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

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Pink Thulite (Zoisite)

Ca2Al3(SiO4)3(OH) - Manganese-bearing Zoisite

Clear Quartz

Silicon Dioxide (SiO2)

Pearl (incorporated into jewelry)

Aragonite and Calcite (CaCO3)

Fluorite

Calcium Fluoride (CaF2)

Pyrite

Iron Sulfide (FeS2)

Magnetite (Iron Ore)

Magnetite (Fe3O4)

Pyrite (on Quartz matrix)

Iron Disulfide (FeS2)

Red Hematite (Banded Iron Formation)

Hematite (Fe2O3)

Gold Ore (in Quartz/Sulfide matrix)

Native Gold (Au) in Quartz (SiO2) and Pyrite (FeS2)

Gold Flakes in Oil (Novelty Specimen)

Native Gold (Au)

Gold

Native Gold (Au)

Gold Ore

Native Gold in Quartz (Au)

Pyrite

Iron Sulfide (FeS2)

Gold Nugget

Native Gold (Au)

Olivine (Peridot)

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

Lapis Lazuli

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

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

Black Tourmaline

Schorl (Sodium Iron Aluminum Borosilicate Hydroxide), NaFe3Al6(BO3)3Si6O18(OH)4

Gold

Native Gold (Au)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Specular Hematite

Specularite (Iron Oxide, Fe2O3)