Arkansas quartz is some of the cleanest quartz in the world awarded the grade of “AAA” gem quality. Quartz is a Mohs 7 hardness out of 10 that makes this a durable stone for jewelry. This 8mm Arkansas cushion cut Ice Quarts necklace set sterling silver is a beautiful pop of flash. Accented with the tapered claw setting and hung from a 18" twisted 1.5mm Italian serpentine chain. Arkansas at its finest!