Man Made Material (Jewelry, Metal Alloy)

Amethyst Geode

Amethyst (Silicon Dioxide), Formula: SiO2

Diamond

Carbon (C)

Banded Calcite (often sold as 'Mexican Onyx' or 'Green Onyx')

Calcite (Calcium Carbonate, CaCO3)

Chert (with Quartz veins)

Microcrystalline quartz (SiO2)

Chert (Cherty Flint/Jasper variety)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Petrified Wood

Silicified Wood (primarily SiO2 - Silicon Dioxide)

Chert (Jasper/Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Labradorite (a variety of Anorthosite or Plagioclase)

Labradorite (member of Plagioclase Feldspar series), (Ca,Na)(Al,Si)4O8

Kyanite (Blue Kyanite)

Kyanite (Al2SiO5)

Chrysocolla

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

Red Jasper

Jasper (Silicon Dioxide with Iron Oxide inclusions), SiO2

Lepidolite

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

Petrified Wood

Silicified wood (Quartz/Chalcedony - SiO2)

Chert (Jasper/Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Petrified Wood

Silicified wood (Quartz variant, SiO2)

Jasper (Red/Brown Variety)

Jasper (Microcrystalline Quartz, SiO2)

Red Jasper

Silicon Dioxide (SiO2) with Hematite impurities

Jasper and Yellow Chert (Tumbled)

Microcrystalline Quartz (SiO2)

Red Jasper

Silicon Dioxide (SiO2)

Chert (Yellow Jasper variant)

Microcrystalline Quartz (SiO2)

Anthracite Coal

Anthracite (Carbon Content: 86%–98%)

Sodalite

Sodalite, Na8(Al6Si6O24)Cl2

Rose Quartz

SiO2 (Silicon Dioxide with trace amounts of titanium, iron, or manganese)

Chert (Jasper/Agate variety)

Microcrystalline quartz (SiO2)

Rose Quartz

Silicon dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Yellow Jasper (Iron-stained Chert)

Silicon Dioxide (SiO2) with iron oxide (Limonite/Goethite) inclusions

Jasper

Silicon Dioxide (SiO2) with iron oxide impurities

Petrified Wood

Silicified Wood (SiO2)

Limonite (Bog Iron)

Limonite (Hydrated iron(III) oxide-hydroxide) - FeO(OH)·nH2O

Banded Chert or Agate

Silicon Dioxide (SiO2)

Black Star Diopside (beads)

Diopside (CaMgSi2O6) - a member of the pyroxene group

Turquoise

Turquoise (CuAl6(PO4)4(OH)8·4H2O)

Rose Quartz

Quartz (Silicon Dioxide with trace inclusions of dumortierite, Al7(BO3)(SiO4)3O3)

Chert (Yellow Chert/Flint)

Silicon Dioxide (SiO2)

Chert (Jasper variety)

Silicon Dioxide (SiO2) with iron oxide impurities

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Lapis Lazuli (Low Grade)

Lazurite-rich metamorphic rock ((Na,Ca)8(AlSiO4)6(SO4,S,Cl,OH)2)

Aquamarine

Aquamarine (Beryl variety) - Be3Al2(Si6O18)

Chert / Flint

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Petrified Wood

Silicified Wood (SiO2)

Chert (varieties include Flint and Jasper)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Jasper)

Cryptocrystalline Quartz (SiO2)