Add a charm to your personality by choosing our 13.00 Cts, 17X14X9 MM Oval-shaped Brown Ethiopian Opal, prized for its ability to intensify its colors when submerged in water. Thoughtfully chosen by hand to ensure fewer to no inclusions on the surface lines than other typical stones. This Cabochon fire play loose gemstone is thought to be effective for people suffering from respiratory or chest problems.