Ametrine

Aka: Trystine or Bolivianite, is a naturally occurring variety of quartz. It is a mixture of amethyst and citrine with zones of purple and yellow or orange. You can facet or cab it. If you don't have any Ametrine jewelry, you don't know what you're missing. Free form pendants made from this stuff are awesome. (3"x2"/1.6 oz./5mm thk)  excellent caber