Corsi Collection of Decorative Stones

view of stone 766

Corsi 766, approx. 145 x 73 x 40 mm, © Oxford University Museum of Natural History

OUMNH Number: 766  
Name and quarry location: Sicilian jasper, diaspro di San Stefano di Quisquina, from Santo Stefano Quisquina, Agrigento, Sicily, Italy  
Geological description: Silicified polymict limestone conglomerate with scattered pyrite and rhombohedral ?dolomite crystals, and some residual fossils. Matrix is part chalcedonic, part colourless quartz. Speckled green areas are filler.  
Comments: Santo Stefano di Bivona is now called Santo Stefano Quisquina, and is near Bivona, Province of Girgenti, Sicily, Italy. Tata (1772) describes a green jasper with some white and other chalcedony patches from a place called 'Portella della Mola in Contrada di S, Stefano detto di Bivona'.  
References: Jervis (1881) 193-318; Jervis (1889) 449-482; Montana & Briuccia (1998); Price (2007) 246-247; Schmidt (2002); Tata (1772) 19-20  
Further information:

Corsi's classification: Class 14. Quartz and its varieties; Species 6. Jasper; ii. Italian jaspers  
Corsi's text: 189.19 Diaspro di S.Stefano di Bivona... di Sicilia  

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