What Is Heated Citrine? The Treatment Is Fine. The Label Is the Problem.
About 90% of commercial citrine is actually heat-treated amethyst. The treatment itself is not the problem. Mislabeling it as natural citrine, or charging natural-citrine prices without disclosure, is. Natural citrine forms from iron impurities in quartz during geological crystallization and is rarer, usually paler yellow, and comes mainly from Brazil, Russia, Congo, and Zambia.