PAIR OF STAR SAPPHIRE AND RUBY RINGS Oval cabochon star sapphire of 16.62 carats, oval cabochon star ruby of 15.70 carats, gold, ring size 6 and 5? SSEF, 2018, report no. 98632: 16.62 carats, Burma, no indications of heating, distinct star effect (asterism) Gübelin, 2018, report no. 18011089: 16.62 carats, Burma, no indications of heating, strong and well centred asterism (star effect), Appendix letter SSEF, 2016, premium report no. 89020: 15.701 carats, Mozambique, no indications of heating, moderate star effect (asterism), Appendix letter Gübelin, 2016, report no. 16097142: 15.70 carats, Mozambique, no indications of heating, distinct asterism (star effect) US$350,000-480,000