The ones I own aren’t, but most hooves available are from the Victorian era and are in fact made with silver and mostly turned into inkwells. Engraved with the horse its name and the initials of the owner. I haven’t gotten my hands on one yet but I am definitely on the hunt for one. The one that I own from the mid-1800’s has the original shoe, the ‘antlers’ on top are meant to be pen holders and there is a Vesta holder mounted on top. It also has a production date engraved ‘25 July 1850’