Corsi Collection of Decorative Stones

view of stone 758

Corsi 758, approx. 145 x 73 x 40 mm, © Oxford University Museum of Natural History

OUMNH Number: 758  
Name and quarry location: Calcedonio di Volterra, Diaspro di Monterufoli, from Monterufoli, near Pomarance, Pisa, Tuscany, Italy  
Geological description: Breccio conglomerate of siliceous jaspery clasts in a groundmass of partially silicified dolomitic limestone, cavities infilled with colourless to grey agate.  
Comments: This stone is from Monerufoli , not far from Volterra. The subtle variation in colour tone made the jasper clasts particularly suitable for portraying petals, shells etc, in Florentine pietre dure work.  
Further information:

Corsi's classification: Class 14. Quartz and its varieties; Species 6. Jasper; ii. Italian jaspers  
Corsi's text: 188.11 Diaspro di Volterra  

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