The Dyck collection was well known for an extremely diverse selection of species, including many significant locality pieces, that showed unusually good aesthetics. This is pretty for "what it is," in other words, or they wouldn't have owned it - but the piece also had to be significant from its find or locality as well. I enjoy the merger of the two criterion, and in owning significant historic pieces which also look good on a shelf such as we have here. This large 3.7-cm bornite crystal is sharp and very fine for the locality with an unusually good luster for this mine. It probably came out in the heyday here in the 1960s-1970s, and Butte today remains a classic locale for which many collectors cherish specimens. The mines here produced what certainly are the best bornites ever found in the US. Here, we have one that is as I said not only significant, but highly aesthetic as well. This one is likely from the Stewart Mine. Ex. Mel and Grace Dyck Collection