Metamorphic Or Mineral

Quartzite (or Ferruginous Quartzite)

Metamorphosed Quartz Sandstone (SiO2 with Fe2O3 impurities)

Apatite

Apatite Group (e.g., Fluorapatite Ca5(PO4)3F, Chlorapatite Ca5(PO4)3Cl, Hydroxylapatite Ca5(PO4)3(OH))

Moonstone

Adularia (orthoclase) or Albite (plagioclase), a potassium aluminum silicate of the feldspar group

Labradorite

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

Quartz Pebble

Silicon Dioxide (SiO2)

Smoky Quartz

Silicon Dioxide (SiO2)

Green Aventurine (Double-Terminated Wand)

Silicon Dioxide (SiO2) containing Fuchsite (Chromium-rich Muscovite Mica)

Banded Agate (Gray Agate)

Silicon Dioxide (SiO2) - Chalcedony

Schorl (Black Tourmaline)

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

Ruby

Corundum (Al2O3 with Chromium trace impurities)

Heat-Treated Citrine (Amethyst-based)

Quartz (Silicon Dioxide) - SiO2

Banded Agate (specifically Eye Agate / Chalcedony)

Agate (Cryptocrystalline variety of Quartz, SiO2)

Citrine Quartz

Silicon Dioxide (SiO2)

Greenstone with Epidote or Quartz Vein

Epidiorite or Metabasalt (composed largely of Chlorite, Epidote, and Amphibole)

Charoite

Charoite (Hydrated silicate of potassium, sodium, calcium, barium and strontium): (K,Sr,Ba)(Na,Ca)2[Si4O10](OH,f)·H2O

Nephrite Jade

Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)

Nephrite Jade

Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)

Citrine

Silicon Dioxide (SiO2) - Yellow Quartz variety

Amethyst

Amethyst (Silicon Dioxide with iron impurities, SiO2)

Petrified Wood (Silicified Wood)

Silicified Paleoflora (mainly Quartz, SiO2)

Nephrite Jade

Tremolite-Actinolite solid solution, Ca2(Mg,Fe)5Si8O22(OH)2

Quartzite River Rock

Quartzite (primarily SiO2)

Nephrite Jade

Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)

Jadeite

Jadeite (NaAlSi2O6)

Green Aventurine

Silicon dioxide (SiO2) with Fuchsite inclusions

Quartzite (River Pebble)

Metamorphosed Quartz Sandstone (primarily SiO2)

Green Quartzite (Aventurine variety)

Silicon Dioxide (SiO2) with inclusions of Fuchsite

Rough Dark Green Sapphire

Corundum (Al2O3)

Petrified Wood (Silicified Wood)

Silicified Wood / Silicon Dioxide (SiO2)

Petrified Wood

Silicified Wood (primarily SiO₂ - Silicon Dioxide)

Quartz (Clear Quartz/Rock Crystal)

Silicon Dioxide (SiO2)

Agate

Silicon Dioxide (SiO2) - Banded Chalcedony

Quartz Pebble

Silicon Dioxide (SiO2)

Milky Quartz

Silicon dioxide (SiO2)

Amethyst

SiO2 (Silicon Dioxide) - Purple variety of Crystalline Quartz

Rhodonite beads (possibly dyed or treated, or lower quality Rhodonite)

Manganese inosilicate, (Mn,Fe,Mg,Ca)SiO3

Red Agate

Agate (Cryptocrystalline variety of Quartz, SiO2)

Tree Agate (Dendritic Agate)

Silicon Dioxide (SiO2) with Manganese/Iron inclusions

Amethyst

Amethyst (Silicon Dioxide - SiO2 with iron impurities)

Quartz (Milky/Common)

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Aquamarine

Beryl (Be3Al2Si6O18 with iron impurities)