Corsi Collection of Decorative Stones

view of stone 854

Corsi 854, approx. 145 x 73 x 40 mm, © Oxford University Museum of Natural History

OUMNH Number: 854  
Name and quarry location: Granito dell'Elba, from the island of Elba, Livorno, Tuscany, Italy  
Geological description: Megacrystic quartz porphyry. Megacrysts of white sub-euhedral feldspar with combined simple and lamellar twinning. Subhedral-rounded glassy quartz phenocrysts (and glomerocrysts) up to 10mm with pale lilac colour. Two feldspar groundmass, buff and white. Partially uralitised amphibole<5%. All set in pale greenish-grey fine-grained matrix.  
Comments: This locality has not been confirmed.  
Further information:

Corsi's classification: Class 16. Granites; ii. Italian granites  
Corsi's text: 209.6 Granito dell'Elba  

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