Corsi Collection of Decorative Stones

view of stone 727

Corsi 727, approx. 145 x 73 x 40 mm, © Oxford University Museum of Natural History

OUMNH Number: 727  
Name and quarry location: Agata delle Alpi, from the Alps  
Geological description: Chalcedony (cryptocrystalline quartz) showing local small-scale cloudy agate-banding; heavily fractured, the fractures iron-stained.  
Comments: This stone has so little banding that without very close examination it appears to be plain grey chalcedony.  
Further information:

Corsi's classification: Class 14. Quartz and its varieties; Species 5. Agate  
Corsi's text: 138.5 Agata delle Alpi  

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