C. 1990. New to our Estate collection, this star ruby pendant necklace is a real prize. Gems of this kind are unique, known for a visual ill… C. 1990. New to our Estate collection, this star ruby pendant necklace is a real prize. Gems of this kind are unique, known for a visual illusion called an asterism -- which presents a star-like design when the light hits just right. Here, the rich red oval cabochon totals 4.95 carats, haloed by .55 ct. t.w. round brilliant-cut diamonds. Crafted in 14kt yellow gold. Rope chain. Lobster clasp, diamond and star ruby pendant necklace. Exclusive, one-of-a-kind Estate Jewelry.