Seller: joeperadua (3,645) 100%, Location: Saint Augustine, Florida, Ships to: Worldwide, Item: 262433794089 It is in excellent ancient condition. A Mezcala Culture Circa 200 B.C.- 300 A.D. pre-Aztec and existing in the time period of the Teotihuacan Culture measuring 7 1/8" x 6 3/4" x 3" deep. The outside of the mask shows the Jade with 1700 years of surface decomposition / original old Jade patina (this is what a Jade boulder looks like before polishing, it is the original ancient surface). The inside of the mask shows the Jade composition more clearly. This is Jadeite. From an old Saint Augustine, Florida collection. This was viewed by Nickolas Stoetzer of Stoetzer's, Inc. in Miami, Fl. and he has agreed with my consensus. I do have Mr. Stoetzer's inventory list of the items we brought to him for authentication and this particular piece has been authenticated as genuine..