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This is a extreme rarity coming from the Paleocene phosphate quarries of the sedimentarian basin of Ouled Abdoun (Morocco)
Erythrite and annabergite (Ni3(AsO4)2·8H2O) (nickel arsenate) form a complete series with the general formula (Co
It does not have any restoration or reparation
Encrinuridae
20304 - Nice Agatized 1.63 Inch Cleoniceras sp Lower Cretaceous Ammonite Madagascar Amethyst This is a extreme rarityCleoniceras 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