Large Boulder Opal with deep blues and some purple flashes. Bezel setting and forged band, hammered texture on three sides. Design Details GOLD - 14k yellow GEMSTONE - Boulder Opal CUT - Free-form cabochon CARAT - 9.80 ct. SIZE - 10x18.5 mm DIAMONDS - 2.4 mm .20 ct. tw. Lab BAND WIDTH - 6 mm tapered back