Large Iridescent Kosmoceras Jurassic Russian Ammonite

Name: Kosmoceras sp.

Age: Jurassic, Callovian Stage

Size: mm (25.4mm=1 inch): 72 mm diameter matrix: 107 mm by 75 mm.

Location: Ulyanovsk, Russia

Code: RA197

Price: $165.00 - Sold


Description: 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. It is well presented on a 107 mm by 75 mm matrix base.

EDCOPE Enterprises Purchase

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