Lightning Ridge, New South Wales, Australia Opal polished by Christine Roussel, Australia Mounted by John Ford Jewelers, Galveston, Texas Featuring a large free form black opal, a picture opal in which one can see a blue-green fish swimming in a sea of pinfire play-of color in predominantly black, orange, green and blue, weighing approximately 98.78 carats, set a in surround of circular brilliant-cut diamonds, weighing approximately 3.48 carats. Length of chain: 18 in