A marine creatures fossil expected to fetch $70k at an auction held in Christies
A rare and beautiful 100-million-year-old petrified shell of an extinct Canadian marine creature is expected to fetch $70k at an auction next week at Christie’s. This fossilized ammonite from Alberta has not been altered.

The fossil has naturally occurring iridescent colors created when the original shell substance turned into a mineral called aragonite. The conditions that produce this phenomenon have only been found in the Bearpaw formation in Southern Alberta (Canada). It’s actually the smaller of two ammonites being auctioned (with the larger expected to fetch well over $100k).
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