You are looking at a Ribbon Boulder turquoise cabochon. The cab has a thin layer of backing. The penny is shown at 19mm for reference. It was freeform cut and has a good shine. The stone shown in the picture is the one that you will receive. Thanks for looking and take a look at my other items. I do combine shipping for no extra charge. To combine it is best to make one payment for all items only when you are ready for me to ship. I will update the invoice after any new purchases. I also ship any order or invoice over $100 for FREE in the USA. Be sure to add me to your favorites list!