Opals are particularly popular because of their characteristic color play - colored flashes of color that change with the angle of observation and occur only with opals. In addition to their joyful play of color, opals are also appreciated for their stability - an important criterion for a jewel that contains about six percent water. It is also a feature of opals that they have precious opals, black opals, fire opals, pink opals, boulder opals, and many other types.
Features of Opal Beads
Crystallography:AmorphousMohs hardness: 5.5-6.5Birthstone: OctoberTypical treatments: Infusion/Impregnation, Surface CoatingOccurrence: Ethiopia / Peru / Australia / Brazil etc.