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 |