Corsi Collection of Decorative Stones

view of stone 858

Corsi 858, approx. 145 x 73 x 40 mm, © Oxford University Museum of Natural History

OUMNH Number: 858  
Name and quarry location: Corsican granite, granito di Corsica, from Corsica, France  
Geological description: Pale grey quartz porphyry. White phenocrysts of feldspar with brownish alteration, glassy quartz and dark green uralitised amphibole in very fine-grained grey groundmass. Phenocrysts tend to form clusters.  
Comments: Note that the brown patches are filler.  
Further information:

Corsi's classification: Class 16. Granites; ii. Italian granites  
Corsi's text: 210.10 Granito di Corsica  

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