Zircon’s blue, almost always the result of heat treatment ... Rarely, zircon might contain long parallel inclusions that create the cat’s-eye effect when the stone is cut as a cabochon. It’s a ...

Many scholars think the stone’s name comes from the Arabic word zarkun, meaning “cinnabar” or “vermilion.” Others believe the source is the Persian word zargun, or “gold colored.” Considering zircon’s ...