Art Deco cluster a fine example of Per Revolutionary Russian Craftmanship, circa 1915, showing platinum mark, makers mark, and city assay mark, possible Moscow. The platinum pieced top is set with a centrally set oval shaped 0.89ctOld mine cut diamond G colour P1 clarity. With eight others having an estimated weight of 4.44ct collectively and smaller diamonds around the periphery totalling 1.31ct total weight. The ring has a total weight of 6.8 grams. Size: P.