Corsi Collection of Decorative Stones

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view of stone 740

Corsi 740, approx. 145 x 73 x 40 mm, © Oxford University Museum of Natural History

OUMNH Number: 740  
Name and quarry location: Calcedonio di Volterra, Diaspro di Monterufoli, from Monterufoli, near Pomarance, Pisa, Tuscany, Italy  
Geological description: Brecciated grey-white chalcedony, agate in part; many clasts have halos of yellow goethite banded with cream-coloured microcrystalline quartz, the latter present elsewhere as matrix.  
Comments: From Monterufoli, Pomarance, near Volterra. Jervis (1889) describes this stone and its use in pietre dure work.  
References: Jervis (1889) 320  
Further information:
 


Corsi's classification: Class 14. Quartz and its varieties; Species 5. Agate  
Corsi's text: 185.18 Agata di Volterra. Achates  

Full entry in English

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