Leopard Skin Rhyolite is a depleted volcanic rhyolite formation that tends to be very solid and takes a great polish. It is well known for its oolitic like appearance of tiny orb like structures, and its blend of an interesting pattern and colors which form leopard print like patterns. This material is getting pretty hard to come by, and when you see it, you certainly don't want to pass it up. Leopard Skin Rhyolite tends to work up very well. Measurements (inches - longest - approx): 6.2 x 2.9 x .31 The last photo has been taken dry so that you may see any defects. The other photos have been taken wet to simulate a polish.