This is a sharp single crystal, unusually blocky and isolated for the species and locality. The locality is ancient, and now an abandoned mine (I have been told specimen mining dates would be between the early 1900s and 1950s or so). It is mesmerizing for its rich iridescence, which I would have to say is the single most flashy iridescence effect I have ever seen in a covellite crystal from any locality. The sharp form combined with the play of blue and purple colors make this a stunning miniature aside from its significance for being from this historic old locality. Minor accents of golden pyrite, is a nice addition. With a 1960s label from the Bradleys (dealers), this was perhaps the best single worldwide specimen among 4000 mixed pieces in the Dennis Mullane collection. Joe Budd photo, shown.