The Chemical Formula of Crystal Stones

Amethyst - SiO2
Bloodstone - SiO2
Carnelian - SiO2
Chalcedony (Agate) - SiO2
Citrine - SiO2
Tiger Eye - SiO2
Quartz (Rose Qtz) - SiO2

Amber C10H16O.
Aquamarine Be3Al2SiO6
Diamond C
Emerald Be3Al2SiO6
Fluorite CaF2
Garnet X3Y2 Si3O12
X = Calcium (Ca), Iron (Fe), Manganese (Mn), or Magnesium (Mg)
Y = Aluminum (Al), Chromium (Cr), or Iron (Fe) **
Hematite Fe2O3
Howlite Ca2B5SiO9(OH)5
Jade NaAl(SiO3)2
Labradorite (Na,Ca)1-2Si3-2O8
Lapis Lazuli Na3CaAl3Si3O12S
Magnetite Fe2+Fe3+2O4
Malachite Cu2CO3(OH)2
Moonstone KAlSi3O8
Pearl CaCO3
Peridot X2SiO4X = Mg or Fe
Pyrite FeS2
Rhodochrosite MnCO3
Rudy Be3Al2SiO6
Sapphire Be3Al2SiO6
Sodalite Na8(AlSiO4)6Cl2
Turquoise CuAl6(PO4)4(OH)8·4(H2O)
Tourmaline (Na, Ca) (Mg, Li, Al, Fe2+, Fe3+)3 (Al, Mg, Cr)6 B3 Si6 (OH,O,F)4
Zircon ZrSiO4