An 8mm trillion blue Sleeping Beauty turquoise 18K yellow gold over sterling silver ring measuring approximately 0.37 inches long by 0.33 inches wide - the turquoise trillion solitaire ring in warm gold. The trillion cut gives the Arizona sky-blue a triangular, pointed form with directional energy that oval and round cuts cannot achieve. At 8mm, the trillion stone is compact but clearly present. Not sizeable. Sterling silver version: WPD281B.