Platinum, 14K gold, diamond and black opal pendant of reversible design, mounted with a cabochon cut oval crystal opal, 4.72 cts., predominantly blue-green color with yellow-green and orangey-red play, surrounded by 20 round brilliant cut diamonds set in platinum, the reverse side mounted with 75 round brilliant cut diamonds. 95 round brilliant cut diamonds total, 4.77 cts. approximate, G-H color, VS2 average clarity. 40.6 grams. 2"L x .75''W, Circa - Late 20th C.