Mineral (Gemstone Variety Of Beryl)

Smoky Quartz

Silicon Dioxide (SiO2)

Jasper

Silicon dioxide (SiO2) with iron oxide impurities

Quartz

Quartz (SiO₂)

Red Tiger's Eye

Silicified Crocidolite (Quartz pseudo-morph after Crocidolite), SiO2

Mahogany Obsidian

Volcanic Glass with Hematite/Magnetite inclusions

White Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Rose Quartz

Silicon Dioxide with traces of Titanium, Iron, or Manganese (SiO2)

Bronzite

MgSiO3 (Enstatite with 10-30% FeSiO3 in solid solution)

Chalcedony (Botryoidal)

Silicon Dioxide (SiO2)

Quartz (likely tumbled or naturally water-worn)

Quartz (SiO₂ - Silicon Dioxide)

Jasper

Silicon dioxide (SiO2)

Quartz (variety of colors)

SiO2 (Silicon Dioxide)

Serpentine

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

Rose Quartz

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

Jasper

Jasper (Silicon Dioxide, SiO2)

Chert (variations include Flint/Jasper)

Chert (Silicon Dioxide, SiO2)

Bloodstone

Heliotrope (a variety of Chalcedony, SiO₂ with inclusions)

Jasper

Jasper (Silicon Dioxide, SiO2)

Chert (Yellow or Brown Jasper)

Microcrystalline Quartz (SiO2)

Jade (likely Jadeite or Nephrite)

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

Chert (Flint)

Chert (Silicon Dioxide, SiO2)

Moonstone

Adularia (orthoclase) or Albite (plagioclase), a feldspar mineral (KAlSi3O8 or NaAlSi3O8 respectively, often a mixture)

Smoky Quartz

Silicon Dioxide (SiO2)

Mixed collection of Quartz varieties, Chalcedony, and metamorphic pebbles

Mixed gemstones (primarily Silicon Dioxide - SiO2)

Rose Quartz

Rose Quartz (SiO2 with traces of Titanium, Iron, or Manganese)

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Snowflake Obsidian

Spherulitic Obsidian (SiO2 + impurities)

Peridot

Olivine (Mg,Fe)2SiO4

Chert (often called Flint when dark)

Sedimentary cryptocrystalline quartz (SiO2)

Chert / Flint

Cryptocrystalline Quartz (SiO2)

Serpentine (Greenstone)

Antigorite, Lizardite, and Chrysolite mixture (Mg3Si2O5(OH)4)

Black Tourmaline

Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)

Amethyst (Quartz variety)

Amethyst [Silicon Dioxide (SiO2)]

Jasper (Iron-rich)

Silicon Dioxide (SiO2) with Fe2O3 (Hematite) impurities

Jasper (Green Jasper/Chert)

Silicon Dioxide (SiO2)

Red Garnet

Garnet Group (e.g., Pyrope, Almandine, Spessartine, Grossular, Andradite, Uvarovite)

Larimar and Fossil Coral

Pectolite (NaCa2Si3O8(OH)) and Hexagonaria/Petoskey Stone

Chert (Jasper)

Silicon Dioxide (SiO2)

Rose Quartz

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

Red Jasper

Silicon Dioxide (SiO2) with Hematite impurities

Smoky Quartz

Silicon Dioxide (SiO2)

Obsidian

Obsidian (Volcanic Glass), primarily SiO2 (Silicon Dioxide)