Corsi Collection of Decorative Stones

view of stone 842

Corsi 842, approx. 145 x 73 x 40 mm, © Oxford University Museum of Natural History

OUMNH Number: 842  
Name and quarry location: Granito antico, locality unknown; possibly a variety of granito nero from between Aswan and Shellal District, Nile Valley, Egypt  
Geological description: Biotite-bearing granodiorite with a band crossing the specimen of more granitic composition with pink potash feldspars.  
Comments: This stone may be a very atypical example of Harrell's variety 'b' of the Aswan granites and granodiorites described on his website (Harrell, pers.comm.). The stone is also known as diorite Egiziano and is found in a number of localities between Aswan and the Shellal district.  
References: Borghini (1997) 224; Corsi (1845) 210-211, 215-216; Harrell (2010a); Lazzarini (2002c) 229; Mielsch (1985) 67; Price (2007) 234  
Further information:

Corsi's classification: Class 16. Granites; i. Antique granite  
Corsi's text: 208.30 Granito antico. Marmor Syenite. Marmo Sienite... [trovata] presso la città di Siene sul confine fra Egitto, e l'Etiopia... Pyrrhopoecilon... Psaronion...Aethiopicum perchè... era Siene sul confine dell' Etiopia.  

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