Hello everyone, I just thought I would post this generally known
on orchid. As a gemstone dealer I have found in the past
few years to my surprise that a fair amount of jewelers are unaware
of the following:
Black quartz drusy is generally dyed black. (There is a natural
black drusy called psilomelane)
Black onyx is dyed black.
Blue topaz is generally irradiated.
There have been more than just a few jewelers who have thought that
the black quartz drusy and black onyx are natural color and that the
blue topaz was heated and unaware that it is generally irradiated.