Corsi Collection of Decorative Stones

view of stone 656

Corsi 656, approx. 145 x 73 x 40 mm, © Oxford University Museum of Natural History

OUMNH Number: 656  
Name and quarry location: Pietra dell'Etna, from Mt. Etna, Catania, Sicily, Italy  
Geological description: Tuff. Moderately sorted coarse-grained dark crystal-rich ash with rounded grains of plagioclase, pyroxene, olivine, and rarer grains of an opaque oxide mineral. It has an overall basaltic composition, and may be the unaltered equivalent of no. 654.  
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Corsi's classification: Class 8. Volcanic stones; ii. Stones from Etna  
Corsi's text: 156.12 Pietra dell'Etna  

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