Sapphires can produce a beautiful “star effect,” or asterism when they catch the light. This occurs when natural inclusions create a star pattern of rays on the surface of a cabochon-cut ...

It is the featured pendant on a necklace comprised of 70 black star sapphires, totaling an additional 104.42 carats. ... double-cabochon star sapphire has not been treated by heat or other ...

The $100 million cabochon-cut star sapphire flaunts a distinctly unique six-rayed beauty and is believed to have been mined at an undisclosed site, around August last year, ...

The number two lot in the sale was a Burmese star ruby and diamond necklace, centered with a 19.53-carat oval cabochon star ruby pendant. Accompanying the center stone are oval cabochon rubies ...