Corsi Collection of Decorative Stones

view of stone 749

Corsi 749, approx. 145 x 73 x 40 mm, © Oxford University Museum of Natural History

OUMNH Number: 749  
Name and quarry location: Diaspro della Tolfa, from Monti della Tolfa, near Civitavecchia, Rome, Lazio, Italy (not confirmed)  
Geological description: Quartzite composed of fine-grained granular quartz with flecks of brown siderite. Cavities contain buff-grey filler.  
Comments: This is not a jasper.  
Further information:

Corsi's classification: Class 14. Quartz and its varieties; Species 6. Jasper; ii. Italian jaspers  
Corsi's text: 187.2 Altro dello stesso luogo [Diaspro della Tolfa presso Civitavecchia]  

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