0.74CT.Natural Flashing rainbow OPAL DOUBLETS AUSTRALIA. Natural OPAL DOUBLETS UNIT OF ITEM (S) : 1 WEIGHT ( CT. ) : 0.74 DIMENSION : 9.76 mm. x 5.51 mm. x 1.71 mm. SHAPE/CUT : FANCY COLOR : RANIBOWS CLARITY/GRADE : VS LUSTER : OPAQUE TREATMENT : NATURAL ORIGIN : AUSTRALIA HARDNESS : 5.5-6.5