Details
TWO UNMOUNTED BOULDER OPALS
With certificate from the Dutch Gemstone Laboratory, dated 23 April 1990, stated that both stones are dark brown with green and blue interference colours, both cabochon-cut and natural boulder opals, respectively 8.92 cts and 15.94 cts (2)
With certificate from the Dutch Gemstone Laboratory, dated 23 April 1990, stated that both stones are dark brown with green and blue interference colours, both cabochon-cut and natural boulder opals, respectively 8.92 cts and 15.94 cts (2)