Ethiopian Opal 6mm Round Cabochon 0.64ct
Ethiopian Opal 6mm Round Cabochon 0.64ct Details: GEMSTONE ETHIOPIAN OPAL ORIGIN ETHIOPIA CARAT WEIGHT 64 CTS (AVG) SIZE 6 X 6 .00MM FAMILY OPAL HARDNESS 5.5 â?? 6.5 SPECIFIC GRAVITY OPAL REFRACTIVE INDEX 1.39 â?? 1.46 CRYSTAL GROUP AMORPHOUS OPTICAL PROPERTIES DISPLAYS OPALESCENCE CARE WEAR OFTEN ANDâ?¦