These are the Rarest and Most Beautiful Gems in the World

Black Opal gems

Composition: Silicon, Hydrogen, Oxygen

Market Value: $2,355 per carat

Black opal, the rarest of all opals and Australia’s national gemstone, is a valuable dark gem that has a bright play of colors or “fire.” It comes from the Lightning Ridge mine in New South Wales. It is relatively scarce.

Read more on the next page...

---

---