A star ruby and diamond cluster ring

A star ruby and diamond cluster ring The circular cabochon star ruby, <i>weighing approximately 12.06 carats</i>, within a brilliant-cut diamond two row tiered surround with baguette-cut diamond single stone shoulders, <i>finger size O</i> <i>Accompanied by report no. GRS2013-120492 dated 16th December 2013 from GRS GemResearch Swisslab stating that the star ruby showed no indication of thermal treatment </i>