Corsi Collection of Decorative Stones

view of stone 760

Corsi 760, approx. 145 x 73 x 40 mm, © Oxford University Museum of Natural History

OUMNH Number: 760  
Name and quarry location: 'Diaspro delle Alpi', from the Alps  
Geological description: Chert; a silicified limestone with abundant forams and other fossil debris.  
Comments: Jaspers are by definition coloured by iron oxides, so this stone is perhaps better termed 'chert'.  
Further information:

Corsi's classification: Class 14. Quartz and its varieties; Species 6. Jasper; ii. Italian jaspers  
Corsi's text: 188.13 Diaspro delle Alpi  

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