All four slabs of chrysoprase for the money. Approx. 1/4 inch thick. One is the "butt end". Photographed dry. Once polished the stones' color will deepen. Chrysoprase is a green variety of cryptocrystalline silica and a subvariety of chalcedony, known for its bright, vibrant apple-green color caused by trace amounts of nickel. It is used in jewelry and for ornamental objects, recognized as the birthstone for May, and believed in some cultures to have healing properties related to joy, prosperity, and emotional well-being. Shipped promptly, insured and gift boxed.