Corsi Collection of Decorative Stones

view of stone 811

Corsi 811, approx. 145 x 73 x 40 mm, © Oxford University Museum of Natural History

OUMNH Number: 811  
Name and quarry location: Porfido delle Alpi, from the Alps  
Geological description: Porphyry with large phenocrysts of white plagioclase feldspar.  
Comments: Corsi's name 'serpentina' is incorrect; this is one of many porphyries found in the Alps, the exact source is not known.  
Further information:

Corsi's classification: Class 15. Porphyry; Species 2. Porphyries (Lacedaemon); ii. Italian 'serpentine' porphyry  
Corsi's text: 201.2 Serpentino delle Alpi  

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