This is in any case an excellent example of the classic English mimetites once known by the varietal name of "Campylite." Hansen thought that, because of the secondary deposition of yellow mineralization atop the orange mimetite, this one had a coating of pyromorphite. It is possible, of course, but very rare. I have not had it analyzed and am selling this simply as a fine mimetite at a fair price. If that is pyro atop, it is a bonus!