The rarest variant of Tithrium was Emberstone, a clear amber-colored crystal that was mined for use in jewelery. An ounce of Emberstone retailed at roughly File:AurebeshSans-Serif credit.png2,500. Another rare crystal found on Charon was the Warming crystal , which when touched or held it emitted a soft relaxing warmth. These crystals were discovered by the systems first inhabitants, at around 20,000 BBY.