STAR SAPPHIRE AND DIAMOND RING, MOUNTED BY HARRY WINSTON

STAR SAPPHIRE AND DIAMOND RING, MOUNTED BY HARRY WINSTON Oval cabochon star sapphire of 59.40 carats, marquise, pear and baguette-cut diamonds, platinum, ring size 6 ¼, unsigned Harry Winston, 2018: Copy of archive letter AGL, 2018, report no. 1095835: Ceylon, no gemological evidence of heat or clarity enhancement