Not much of a sales pitch for this - ugly rock, cool history and locality! The thin layer of green pyro coats large quartz crystals. This is a famous find, once noted in literature I am told. It was clearly found at the same time and owned by the same person as the following specimen. There was only one old paper label noting the collection date, for the two pieces together. This piece DOES have an original catalogued label as shown, though, which in sequence is very close to the label number shown below (within 13 specimens!), so my assumptions above are certainly validated, I think. The dated paper label goes with the next specimen but the buyer of this specimen will also get a photocopy.