List of gem varieties where an origin determination may be requested:

Standard: We provide an origin determination on the following gem varieties/materials:

  • Sapphire (all colors)
  • Ruby
  • Emerald
  • Paraiba/Paraiba-type tourmaline
  • Alexandrite
  • Demantoid Garnet
  • Pink to Red Spinel
  • Cobalt Spinel

 

Occasional: We provide an origin determination on the following gem varieties/materials:

  • Opal
  • Cats-Eye Chrysoberyl
  • Spinel (colors other than pink to red and cobalt)
  • Hiddenite Spodumene

 

Those occurring from only one location: Some gem varieties/materials are only known from one source. As a result, we indicate the origin without an additional charge.

  • Tanzanite (Tanzania)
  • Benitoite (USA – California)
  • Red Beryl (Bixbite: USA - Utah)
  • Tsavorite (East Africa)
  • Pezzottaite (Madagascar)