Stunning Fire Opal Cleoniceras Ammonite

Cleoniceras besairei Ammonite

Phylum Mollusca, Class Cephalopoda, Subclass Ammonoidea, Order Ammonitida

Geological Time: Middle Cretaceous, Albian Stage (150 mya)

Size: 84 mm diameter

Fossil Site: Tulear, Madagascar

Description: A spectacular ammonite is a Cleoniceras besairei from Madagascar which has been polished to show the wonderful fire opal iridescence for which they are known. This is a consequence of light passing through the various layers of aragonite and conchiolin deposited by the ammonite in life. The lack of acidity in the depositional environment allowed them to be preserved as you see it here. Jewel-quality material such as this coming from Alberta, Canada is termed “Ammolite” in the trade, and typically commands a high price. This is a stunning example of an intristic beauty of the ammonite from the Albian (112 m.y.a) deposits of Madagascar.

Also see: Ammonite Fossils

click ammonite pictures to enlarge

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