Billy Goat Diamond Necklace made by Nayla Shami. The Billy Goat is made from oxidized sterling silver with 18 karat gold hooves, collar, horns and tail. The body of the billy goat is covered in beautiful diamonds and his eye is a ruby. This necklace is perfect for the goat lover in your life. The 18 karat yellow gold chain measures 18″ inches long with ability to wear at 16″inches.