This is an absolutely top quality and quite rare mastodon astragalus (ankle bone). Super well preserved and detailed example with crisp features all around. Rock solid and very heavily mineralized; it weighs 2lb 9.8oz. Beautiful milk chocolate glossy patina. This is probably the finest mastodon astragalus that we have ever offered for sale. Due to the size and weight of this specimen the website's shipping quote will not be accurate for all buyers.