Rocks Forever Engagement Ring Collection: Carol 18ct Yellow Gold Ring with a Round Brilliant Cut Centre Diamond in a Cushion Double Halo Claw Setting A classic round brilliant cut diamond and with a diamond set band creates the ultimate striking engagement ring. This inctricate piece creates a visually stunning ring - the double halo gives an illusion of a larger centre diamond and results in a magnificent sparkle from any angle. Center Diamond Carat Weight: 0.80ct Total Diamond Carat Weight: 1.00ct Laboratory Grown Certified Diamond A 'lab grown diamond' shares the exact same chemical and physical properties as an earth-mined diamond, just produced in a controlled laboratory setting. Through expert research and development, scientists have found a way to create a diamond in a lab setting by mimicking the exact process and conditions required to form a natural diamond.