Size is about =   23.8 x 17.2 x 5.7mm

You are looking at a green Alunite cabochon. The total weight is with a thin layer of backing.  The penny is shown at 19mm for reference only.  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.    I also ship any order or invoice over $100 for FREE in the USA.  Be sure to add me to your favorites list!