An old US classic now, these were found in the 1960s and remain the finest vivianites ever from the USA. They have a unique purple color - I have no idea what causes it, but NO other vivianites from any other locale seem to have it, so these are unmistakable when they do turn up. This specimen has a particularly well-formed, robust crystal that is much thicker at 5-6 mm than most such specimens (they tend to be 2-3mm). The dominant crystal displays dramatically, and as you can see backlights pretty impressively too, to show off that novel color. Fine old pieces like this, particularly as superb miniatures, are NOT easily obtained and are only available as the major old collections are recycled. Ex. Jaime Bird Collection.