YAG, LuAG, GAGG

YAG (Yttrium Aluminum Garnet), LuAG (Lutetium Aluminium Garnet), and GAGG (Gadolinium Aluminium Gallium Garnet) are all synthetic gemstones with no natural equivalent.  They are known for their brilliance, durability, and a large variety of available colors.  Their affordability and hardness make them a perfect choice for use in jewelry.


 YAG LuAG GAGG
Hardness (Mohs) 8.5 8.4 6.5 - 7.5
Refractive Index 1.823 - 1.843 1.83 - 1.85  1.97 - 2.02
Density (g/cm3) 4.5 - 4.6 6.71 7.08
Dispersion: 0.028 0.025 0.028
Growth Method Czochralski Czochralski / Hydrothermal Czochralski