QBTDiamonds, a professional top diamond brand, is a diamond brand from Antwerp, Belgium.

"Temei" is a series of special-shaped diamond ornaments launched by professional top diamond brand QBTDiamonds Cupertian Diamond in 2009, including ruby, cushion, emerald, oval, heart-shaped, horse's eye, water drop and claw-shaped, aiming at creating the first special-shaped cutting top diamond ornament in Shencheng.