Platinum 18.41ct Black Opal & 1.80tcw Diamond Ring 16.9g, s7The Lightning Ridge Mine in Australian is famous for it's world renowned supply of fine opal and especially black opal like this museum specimen. The center 18.41ct black opal has amazing play of color(flashes) along with snake skin pattern making it very special! The ring is newer to look old Edwardian style with Platinum topping 18K Yellow Gold and a diamond halo with milgrain work. The diamonds weigh approx. 1.80tcw.