22134 - Cut & Polished 5.50 Inch Cleoniceras sp Lower Cretaceous Ammonite Madagascar - Agatized Nileus Cerussite (also known as lead

Cerussite (also known as lead carbonate or white lead ore) is a mineral consisting of lead carbonate (PbCO3)

These specimens are preserved as internal molds

Woodward 1891 (mosasaur)

I sent a sample to the Laboratory of Applied Petrology of the Department of Earth Sciences of the University of Alicante

It is a well preserved tooth

22134 - Cut & Polished 5.50 Inch Cleoniceras sp Lower Cretaceous Ammonite Madagascar - Agatized Nileus Cerussite (also known as leadCleoniceras sp, Parona and Bonarelli 1897 (ammonite) Cephalopoda Ammonitida Cleoniceratidae Cleoniceras is a rather involute, high whorled hoplitid from the Lower to basal Middle Albian of Europe, Madagascar, and Transcaspian region. The shell has a generally small umbilicus, arched to acute venter, and typically at some growth stage, falcoid ribs that spring in pairs from umbilical tubercles, usually disappearing on the outer whorls. These ammonites