This is a large, dramatic matrix specimen with crystals to 9mm, from THE classic US pyro locality from the late-1800s until the discovery of more pyros in Idaho only in the 1980s. And still, these are unique, different, and highly desired among collectors. The mines are inaccessible and specimens like this, of such size, are now few and far between on the market - obviously, they come up only when old and complete colections are recycled to the hobby.