Corsi Collection of Decorative Stones

view of stone 756

Corsi 756, approx. 145 x 73 x 40 mm, © Oxford University Museum of Natural History

OUMNH Number: 756  
Name and quarry location: Diaspro di Barga, from Barga, Lucca, Tuscany, Italy  
Geological description: Milky white chalcedony with aggregates of red hematitic inclusions is cut by a rhombohedral network of fine calcite-filled fractures. Later chalcedony/colourless quartz replaces and is coloured by orange brown siderite. Secondary fractures are more sinuous and random. Dark brown areas are filler/polishing compound.  
Comments: From Barga, Tuscany, Italy. Jervis (1881) describes the precise locality, geological context, and the famous use of the Barga jasper in the chapel of the Princes in the Church of San Lorenzo in Florence.  
References: Corsi (1825) 187-188; Giusti (1992) 269; Jervis (1881) 357; Price (2007) 247  
Further information:

Corsi's classification: Class 14. Quartz and its varieties; Species 6. Jasper; ii. Italian jaspers  
Corsi's text: 187.9 Diaspro di Barga in Toscana  

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