Ethiopian Opal Ring, Solid Round Colour Flash, 925 Silver, r2 Size 7Ethiopian Opal Ring, 925 Sterling Silver Lovely Oval Ethiopian Opal Cabochon with nice colour flashes. A simple Bezel setting holds the stone securely, it also has a wider step at the base to frame the stone better. The setting is also open at the back so the energy of the stone can flow more freely. Ethiopian Opals are a relatively recent discovery, and they form differently to Australian Opals. They are always found as solid nodules, not thin veins