40004816, Marlborough, 436, Magic Gem. Chnoubis inscribed CHNOUPHIS and around it inscribed, CNOUMIS GIGANTOPLEKTA BARWFITA, Unknown, Boardman, J., Scarisbrick, D., Wagner C., Zwierlein-Diehl, E: The Marlborough Gems (2009), Story-Maskelyne, M.H.: The Marlborough Gems (1870), no. 436, Mottled plasma

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