Being unfamiliar with purple turquoise, I immediately headed for Google to try to find out more. I discovered that it can be a synonym for the semi-precious stone sugilite, that it can be a dyed and heat treated matrix mixed with a resin and red dye, allowed to set and then cut, or that there is actually a mystery stone called purple turquoise from the remote town of Copiopo, Chile.

The origins of the purple turquoise in this ring by Colette remain to be discovered. The large oval stone (1.63 inches long, set horizontally across the base of the finger) is set with and accented by .50 of diamonds, and set into 18k white gold. Available for purchase only online from Fragments, it is USD $6540.