Mineral (Gemstone Variety Of Beryl)

Blue Lace Agate

Silicon Dioxide (SiO2), variety of Chalcedony

Dyed Purple Agate Sliced Tablet

Silicon Dioxide (SiO2), variety Chalcedony

Black Onyx

Silicon Dioxide (SiO2) - Chalcedony variety

Jasper (specifically Red or Brecciated Jasper variant)

Jasper (Microcrystalline Quartz - SiO2)

Rose Quartz

SiO2 (Silicon Dioxide with trace inclusions)

Sodalite

Sodalite, Na8(Al6Si6O24)Cl2

Yellow Quartz (Citrine Quartz variety / Ferruginous Quartz)

Silicon Dioxide (SiO2) with iron inclusions

Black Onyx and Verdigris Copper Jewelry

Chalcedony (SiO2) with Copper Patina

Obsidian

Volcanic glass (high silica volcanic rock)

Banded Chert (Flint/Jasper variety)

Microcrystalline Quartz (SiO2)

Red Jasper (Beaded Necklace)

Silicon dioxide (SiO2) with iron oxide inclusions

Yellow Jasper (Chalcedony)

Silicon Dioxide with Iron inclusions (SiO2)

Yellow Jasper

Silicon Dioxide (SiO2) with hydrated iron oxide impurities

Carnelian

Carnelian (a variety of Chalcedony), SiO2 (Silicon Dioxide)

Brown Jasper

Silicon Dioxide (SiO2)

Garnet

Garnet Group (complex nesosilicates with general formula X3Y2(SiO4)3, where X can be Ca, Mg, Fe2+, Mn2+ and Y can be Al, Fe3+, Cr3+, V3+)

Chalcedony

Chalcedony (a microcrystalline variety of Quartz, SiO2)

Moss Agate

Silicon Dioxide (SiO2) with inclusions of manganese or iron oxides

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

Yellow Jasper / Chert

Jasper (Silica/Quartz) - SiO2

Yellow Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Turquoise (Rough Specimens)

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

Jasper

Silicon dioxide (SiO2)

Labradorite (a variety of Feldspar)

Labradorite; (Na,Ca)(Al,Si)4O8 (a plagioclase feldspar)

Banded iron formation (ironstone)

BIF; hematite–magnetite–quartz/chert assemblage

Amethyst (Quartz variety)

Amethyst [Silicon Dioxide (SiO2)]

Lapis lazuli and green-blue chalcedony jewelry

Lapis lazuli: lazurite-bearing metamorphic rock, chiefly lazurite (Na₃Ca(Al₃Si₃O₁₂)S) with calcite and pyrite; second stone: likely chrysoprase or green-blue chalcedony (microcrystalline quartz, SiO₂)

Rose Quartz

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

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Quartz (pebble)

Quartz (SiO₂)

Red jasper (likely tumbled)

Jasper, microcrystalline quartz/chalcedony (SiO₂), colored mainly by iron oxides

Yellow Jasper

Silicon dioxide (SiO2)

Blue Quartzite

Silicon Dioxide (SiO2) with inclusions

Red Jasper

Jasper (Silicon Dioxide with Iron Oxide inclusions, SiO2)

Black Moonstone

Potassium Aluminum Silicate (KAlSi3O8)

Garnet-Bearing Schist

Almandine Garnet Micaceous Schist

Rose Quartz

Silicon Dioxide (SiO2)

Black Opal

Amorphous Hydrated Silica (SiO2·nH2O)

Chert (Flint variety)

Silicon Dioxide (SiO2)

Chalcedony (Banded/Mottled Variety)

Chalcedony (a cryptocrystalline variety of Quartz, SiO2)

Garnet (Almandine/Pyrope variety)

Silicate mineral group; typically Fe3Al2(SiO4)3 (Almandine) or Mg3Al2(SiO4)3 (Pyrope)

Chert (Nodule)

Chert (variety of microcrystalline quartz, SiO2)