Gelin Abaci Tension 14kt White Gold Princess Twist Semi Mount This tension setting is in 14kt white gold that twists to hold a square stone with .14cts. of round brilliants laced up either side. The center stone is held in by 65lbs-95lbs of pressure and is ordered to your finger size. A .50ct-1.00ct square stone or a .50ct-1.00ct oval stone can be set in the center. Pictured in the center is a CZ stone.