Corsi Collection of Decorative Stones

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

Enter some search terms
Show results as:

search tips

Searches the database for all stone records containing the words you enter. To search for a text string, put it between quotation marks. To search for stone records that don't contain a word, put a minus sign in front of it.

For example, entering: granite "coarse-grained" -Egypt will find all the coarse-grained granites that do not come from Egypt.

Terms of three characters or less have not been indexed.