Types Of Quartz And The Enhancements Or Treatments Used . Gem .
Feb 23, 2011 . Other crystalline quartz varieties include Rock Crystal, Amethyst, Citrine, Ametrine, Prasiolite, Rose Quartz, Smokey Quartz, and Aventurine, as well as Hawk's . Deposits are found in Brazil, India, Austria, Russia and Tanzania. ... 2 those that require knowledge, skill and the use of equipment to identify.get price