Corsi Collection of Decorative Stones

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view of stone 653

Corsi 653, approx. 145 x 73 x 40 mm, © Oxford University Museum of Natural History

OUMNH Number: 653  
Name and quarry location: Pietra dell'Etna, from Mt. Etna, Catania, Sicily, Italy  
Geological description: An intermediate volcanic rock with abundant phenocrysts of feldspar and sparse pyroxene crystals set in very fine grained grey matrix. The feldspars are strongly aligned. They are probably plagioclase, and so the rock may be a porphyritic andesite.  
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Corsi's classification: Class 8. Volcanic stones; ii. Stones from Etna  
Corsi's text: 156.9 Pietra dell'Etna  

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Funded by Esmée Fairbairn Foundation Oxford University Museum of Natural History University of Oxford