Gold 15 weight: 5.5 grams. Ring size: O A striking piece of blue/green black Boulder opal set with a 3.5 mm G vvs2 diamond in 22 kt. gold. A great ring to be worn pointing toward the tips of long fingers. Malays, Indonesians, & Singaporeans please note: emas bagus, brillian numer satu, dan kalimaya asli.