Corsi Collection of Decorative Stones

view of stone 657

Corsi 657, approx. 145 x 73 x 40 mm, © Oxford University Museum of Natural History

OUMNH Number: 657  
Name and quarry location: Pietra dell'Etna, from Mt. Etna, Catania, Sicily, Italy  
Geological description: Ignimbrite. A streaky-textured volcaniclastic rock containing carbonate minerals. It has crystals and crystal clusters of feldspar, pyroxene, opaque mineral, and possibly altered olivine. Half of the specimen has a faint shard structure and possibly some flattened pumice clasts.  
Further information:

Corsi's classification: Class 8. Volcanic stones; ii. Stones from Etna  
Corsi's text: 157.13 Pietra dell'Etna  

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