Phenakite

"If you didn't know it was a phenakite," quips Rob Lavinsky, "you would swear it was a killer Herkimer Diamond." Indeed, this observation points to two possible misidentifications for these gems. People have confused phenakites, like this beautiful Brazilian specimen, with both quartz and diamond gems. (So-called "Herkimer Diamonds" are actually double-terminated, water-clear quartz stones). © Rob Lavinsky, www.iRocks.com. Used with permission.

Article: Phenakite Value, Price, and Jewelry Information

Credit: www.iRocks.com