Opaline pear cabochon measuring 8x10mm Please note opaline is a manufactured glass, not a naturally occuring gemstone - however, its milky translucent appearance is just stunning and we will be wearing opaline for a long time yet! Please note that certain pieces will be more translucent than others, some will be very white, some will be clearer - if you require matched pairs, please ask. Also, if you have any other preferences, do let us know and we will do our best to get you the right pieces!