RILEY DIAMOND ENGAGEMENT 18K WHITE GOLD RING BY MIKE NEKTA GIA CERTIFIED Center Diamond: Carat Weight: 6 Carat Color: I Clarity: SI2 Style: ROUND BRILLIANT CUT Measurements: 11.7 - 11.8 x 7.2 mm Ring: Metal: 18K WHITE GOLD Style: Sidestones Pave Size: Can be adjusted to any sizeFrom oversized solitaires to radiant statement pieces — find your big diamond now.