Corsi Collection of Decorative Stones

view of stone 751

Corsi 751, approx. 145 x 73 x 40 mm, © Oxford University Museum of Natural History

OUMNH Number: 751  
Name and quarry location: Diaspro delle Alpi, from the Alps (not confirmed)  
Geological description: Deformed ferruginous chert, markedly dense hematite-rich rock. Fractures are filled with greenish quartz. It might be associated with an ophiolite deposit.  
Comments: Despite its superficial appearance, this is not a jasper. Nos. 751-753 all have bevelled edges, suggesting they came to Corsi from the same source.  
Further information:

Corsi's classification: Class 14. Quartz and its varieties; Species 6. Jasper; ii. Italian jaspers  
Corsi's text: 187.4 Diaspro delle Alpi  

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