A fabulous, objective and very informative website I use provides some great factual information on Turquoise.  I have excerpted parts of this site here for the GURHAN customer who has a curiosity as to Turquoise and wishes to better understand the stone that Gurhan so commonly uses.

The reincarnation of an ancient heritage  Pure 24 karat gold jewelry was so important historically:  why don’t more designers create in it today? P...