The Signature Midi Knockout Pendant features a genuine pearl surrounded by a thin gold outline and suspended on a fluid box chain. Our silicone slide closure allows you to gently pull the chain and adjust it to your desired length. Gemstone: Iridescent Sky Blue (man-made). This soft blue synthetic gemstone is handcrafted as a doublet, a technique that lends it extra iridescence through a mother-of-pearl backing. Gemstone Diameter: 7mm