Colorado zircon is mentioned in old US mineralogy books, but seldom do you see a really good one. This specimen comes from the Harvard Museum collection via the Lawrence Conklin collection, and we guess dates to the early to mid 1900s. It is numbered 21612 and "Reese exchange" on the Harvard label. It features relatively lustrous, sharp, somewhat translucent crystals on matrix, and is complete nearly all around. Joe Budd photos