Corsi Collection of Decorative Stones

view of stone 744

Corsi 744, approx. 145 x 73 x 40 mm, © Oxford University Museum of Natural History

OUMNH Number: 744  
Name and quarry location: Diaspro antico, locality unknown  
Geological description: Brecciated jasper with black-speckled clasts, many with full or partial rims of opaque white chalcedony. Colourless/white/grey agate matrix has patchy yellow speckling, euhedral crystal inclusions of goethite, and minor late-stage crystalline quartz. No sardonyx is present.  
Comments: Provenance not known.  
References: Corsi (1845) 225-226  
Further information:

Corsi's classification: Class 14. Quartz and its varieties; Species 6. Jasper; i. Antique jaspers  
Corsi's text: 186.2 Diaspro. Jaspis. Diaspro antico  

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