Size is about =  36.6 x 15.9 x 7.7mm.

You are looking at a natural White Buffalo Turquoise Ribbon Boulder Cabochon. This rare material comes from Nevada, USA.  The total weight is with a thin layer of backing.  The penny is shown at 19mm for reference only.  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.    I also ship any order or invoice over $100 for FREE in the USA.  Be sure to add me to your favorites list!