Corsi Collection of Decorative Stones

view of stone 755

Corsi 755, approx. 145 x 73 x 40 mm, © Oxford University Museum of Natural History

OUMNH Number: 755  
Name and quarry location: probably Sicilian jasper, diaspro di Sicilia, from Sicily, Italy  
Geological description: Jasper - a silicified ferruginous limestone, with agate-filled voids and patches of creamy white crystalline calcite. Goethite forms spherular inclusions in orange jasper.  
Comments: Perhaps calcedonio di Volterra from Monterufoli, Pomerance, near Volterra, but it is more likely to be Sicilian, matching ‘Diaspro rosso e giallo fiorito di Sicilia' in Corsi’s tabletop of modern marbles in the Natural History Museum, London.  
Further information:

Corsi's classification: Class 14. Quartz and its varieties; Species 6. Jasper; ii. Italian jaspers  
Corsi's text: 187.8 Diaspro di Volterra  

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