Mineral (Gemstone Variety Of Beryl)

Pyrite (or Fool's Gold)

Pyrite (FeS₂)

Vesicular Basalt with Amygdaloidal Infill

Basalt (Mafic Extrusive Igneous Rock)

Obsidian

Volcanic Glass (SiO2, usually >70% silica content)

Pearl

Aragonite (CaCO3) with Conchiolin

Amethyst (Agate/Chalcedony variety)

Silicon Dioxide (SiO2) with iron impurities

Yellow Jade (Yellow Chalcedony/Quartz)

Silicon Dioxide (SiO2)

Carnelian Agate

Carnelian (Silicon Dioxide - SiO2 with Fe impurities)

Diamond (in jewelry setting)

Carbon (C)

Banded Chalcedony (Agate)

Chalcedony (SiO2) - Cryptocrystalline Quartz

Moonstone

Adularia (Potassium Aluminum Silicate, KAlSi3O8)

Diamond (in jewelry setting)

Adamantine Carbon (C)

Rose Quartz

Silicon Dioxide (SiO2)

Blue Kyanite

Kyanite (Al2SiO5)

Clear Quartz

Silicon Dioxide (SiO2)

Granite

Granite (composed primarily of Quartz SiO2, Feldspar (KAlSi3O8), and Mica)

Vesuvianite (Idocrase)

Ca19(Al, Mg, Fe)13(SiO4)10(Si2O7)4(OH, F, O)10

Chert (Flint)

Microcrystalline Quartz (SiO2)

Turquoise

Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)

Wood Jasper

Siliceous sedimentary rock (variety of Chert/Chalcedony)

Serpentine

Antigorite, Lizardite, or Chrysotile (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4

Basalt

Basalt (Mafic Extrusive)

Granite Pegmatite with Tourmaline and Muscovite

Pegmatite (Feldspar: KAlSi3O8, Quartz: SiO2, Schorl: NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH))

Red Moss Agate or Jasper-Agate

Silicon Dioxide (SiO2)

Rose Quartz

SiO2 (Silicon Dioxide)

Smoky Quartz

Smoky Quartz (Silicon Dioxide - SiO2)

Rough Citrine Quartz

Silicon Dioxide (SiO2) with ferric iron impurities

Carnelian

Carnelian (Varietal of Chalcedony, SiO2 with Iron Oxide impurities)

Rose Quartz

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

Peridot

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

Banded Agate

Agate (Silicon Dioxide - SiO2)

Calcite

Calcium Carbonate (CaCO3)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Sandstone

Arenite (composed primarily of SiO2)

Labradorite

Labradorite (a calcium-enriched feldspar mineral), (Ca, Na)(Al, Si)4O8

Jasper (Yellow Jasper)

Silicon Dioxide (SiO2) with iron inclusions

Garnet (likely Almandine, Pyrope, or a blend)

Garnet group minerals: X3Y2(SiO4)3, where X and Y represent various metal ions (e.g., Almandine: Fe3Al2(SiO4)3, Pyrope: Mg3Al2(SiO4)3)

Tiger's Eye

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

Tiger's Eye

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

Banded Chert

Cryptocrystalline Quartz (SiO2)

Chalcedony (Botryoidal)

Silicon Dioxide (SiO2)

Chevron Amethyst

Crystalline Silicon Dioxide with Iron impurities (SiO2)

Smoky Quartz

Silicon Dioxide (SiO2) with trace aluminum and irradiation