Rare Double-star Blue Sapphire--A Published Gem Sri Lanka Polished as an oval cabochon with a high dome, this sapphire of classic Sri Lankan cornflower blue, possesses a very unusual form of asterism: when the stone is illuminated with a single point light source, two superimposed six-rayed stars appear. The rays of one star are almost parallel to, and just to the side of, the other.
Rare Marcus & Co. 5.76 ct t.w. Lavender Blue Star Sapphire & Diamond Ring Platinum | Antique & Estate Jewelry | Jewelry Finds Price: $6850.00 Here is an authentic and original 1930's 'Marcus & Co.' museum quality heirloom ring! A highly valuable and rare Marcus & Co. star sapphire, diamond and platinum ring from the early Art Deco era. This designer and artist is even more sought after than Tiffany & Co. and Cartier pieces from it's time