JAIPUR GEMSTONE-5.00 Carat Unheated Untreated Star Sapphire Stone Pendant Original Certified Gemstone

Star sapphires exhibit a special optical phenomenon called asterism. Tiny needles of silk within the sapphire crystal reflect light and form a star sapphire's telltale star. The most common star pattern is a 6-rayed star, although star sapphires with 4 rays and 12 rays have been found.