This modern-chic 14K white gold London blue topaz necklace brings the geometric trend to life ? a kite-shaped topaz gem looks as if it is floating within a delicate square-shaped diamond frame that has been turned 45-degrees. The chain goes behind each shape, merging them into a cohesive design. Since the amethyst does not touch the frame, there is a lot of open space around the stone, creating a lighter and fresher look to this beautiful necklace.