Lot 637
9 Inch Long Ammonite With Preserved Mother-of-Pearl. Most Ammonites have a coiled spiral shape. The name "ammonite" comes from the Egyptian god Ammon, who is depicted with a coiled ram's horn. This 9 inch long ammonite from Russia (Ancyloceras matheronianum) is over 100 million years old and has an unusual, mostly uncoiled, shape called Heteromorphic. Heteromorphic ammonites start out with a tight curl and, for some unknown reason, begin to uncoil as they grow longer. This large and strikingly beautiful ammonite is nearly complete, with just the smallest inner curls missing, and the original white mother-of-pearl has fossilized to an iridiscent brown and tan with splases of white still present. The museum-quality ammonite is neatly contrasted against a black slate matrix. Weight is 6½ pounds.
Estimated Value $900 - 1,500.
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