The Signature Midi Knockout Pendant features a brilliant-cut gemstone 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 Pearl (Man-Made). This pearlescent gemstone is handcrafted as a doublet, a technique that lends extra radiance through a mother-of-pearl backing atop a crystal quartz gem. Length: 14 - 19" (Adjustable) Gemstone Diameter: 7mm