Superbly Iridescent Kosmoceras Ammonite

Kosmoceras sp. Ammonite

Geological Time: Jurassic Callovian Stage

Size (25.4 mm = 1 inch): 67 mm diameter matrix: 80 mm by 80 mm.

Fossil Site: Ulyanovsk, Russia

Fossil Code: RA191

Price: $125.00 - sold


Kosmoceras AmmoniteDescription: A magnificent example of the ammonite Kosmoceras sp. of the Callovian Stage (161 m.y.a) deposits of Russia. Ammonites of this degree of preservation are difficult to come across. The high degree of preservation of the natural mother-of-pearl shell makes it appear to be preserved as fire opal. This is a consequence of light passing through the various layers of aragonite and conchiolin deposited by the ammonite in life. This one is quite highly colored, making for a most attractive specimen.

Ammonite Fossils Purchase Information

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