Based on the classic three-stone design, this Thai blue star sapphire ring is not like your classic trilogy designs. The ring features an oval-shaped Thai blue star sapphire flanked with two D-shaped natural white zircon gems which are rarely offered making it unique. Three stone designs are also known as trilogy designs and they are symbolic of the past, present, and future. Made in sterling silver, this trilogy Thai blue star sapphire rings has the prong setting for all the three gemstones for a firm grip and maximum brilliance. The metal frame has a platinum finish for an everlasting shine. Finished under gallery offers comfortable wear. Thai Blue Star sapphire is a rare variety of sapphires that exhibits a rare asterism. A six-rayed star appears to float across the surface of the stone under specific lighting.