I came across these natural stones and had to have them. They are called howlite. White with black and gray swirls that look just like marble. I paired them with black and gray Swarovski crystals and a silver bar in the center. It is a choker style necklace but does not fit too snug. Check out more pictures of this necklace and my other creations @ EklecticExpressions.Etsy.com. Contact me with any questions or custom orders.