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Mahogany paper grain — description and returns beneath the overlapping buy card.
Agee and H
This variety of quarz is called chalcedony
this specimen presents an additional scientific interest given the classification difficulty
Apatite is a group of phosphate minerals
Aragonite is a carbonate mineral
30683 - Well Preserved 1.15 Inch Cyphaspis (Otarion) cf. boutscharafinense Devonian Trilobite Study Agee and HOtarion, Zenker 1833 (trilobite) Trilobita Proetida Aulacopleuridae Synonyms: Conoparia Hawle and Corda 1847 (no. 155231), Otarionella Weyber 1965 (no. 21276) Parent taxon: Aulacopleuridae according to P. A. Jell and J. M. Adrain 2003 See also Jell and Adrain 2002, Sepkoski 2002, Thomas and Owens 1978 and Whittington 1941 Sister taxa: Aulacopleura, Aulacopleurinae, Coignouina, Cyphaspides, Dixiphopyge, Goodsiraspis, Maurotarion, Namuropyge,