Corsi Collection of Decorative Stones

view of stone 770

Corsi 770, approx. 145 x 73 x 40 mm, © Oxford University Museum of Natural History

OUMNH Number: 770  
Name and quarry location: Sicilian jasper, probably diaspro di Troina, from Troina, Enna, Sicily, Italy  
Geological description: Radiolarian chert coloured by included limonite mainly concentrated between radiolaria tests. The few thin fractures are agate-banded.  
Comments: Probably from Troina (formerly Traina), Province of Enna, Sicily, Italy. Both Borch (Montana, 1998) and Jervis (1881, 1889) describe 'agate’ coloured yellow from this locality.  
References: Jervis (1881) 288; Jervis (1889) 477; Montana & Briuccia (1998) 37-38; Price (2007) 246-247; Schmidt (2002)  
Further information:

Corsi's classification: Class 14. Quartz and its varieties; Species 6. Jasper; ii. Italian jaspers  
Corsi's text: 189.23 Diaspro di Traina... di Sicilia  

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