The necklace is either silver or silver plated. It's design features a chain-like, elongated form, with a bezel-set, square-cut diamond like brilliant-cut gemstone in a square-shaped metal setting. 
The stone is a brilliant, light-blue-white color.  The metal band surrounding the stone has a slightly recessed or concave shape, creating a slight shadow under the stone. Choker's total Length is 16 inches.