Corsi Collection of Decorative Stones

view of stone 769

Corsi 769, approx. 145 x 73 x 40 mm, © Oxford University Museum of Natural History

OUMNH Number: 769  
Name and quarry location: Sicilian jasper, diaspro di Piano Maglio, from Piano Maglio, Altofonte, Palermo, Sicily, Italy  
Geological description: Heavily fractured banded jasper with rhombohedral carbonate mineral inclusions (dolomite/siderite?). Fractures are filled with grey agate, in turn filled with colourless quartz. Fine calcite or ankerite veins cross the specimen.  
Comments: Piano dei Magli is a locality referred to by Borch, according to Montana (1998). Tata (1772) also cites this locality for jasper, and says it is near Parco, a locality close to Monreale. It is now called Piano Maglio and is part of the commune of Altofonte (formerly called Parco, or Parcu in Sicilian).  
References: Jervis (1881) 193-318; Jervis (1889) 449-482; Montana & Briuccia (1998) 33, 76-77; Price (2007) 246-247; Schmidt (2002); Tata (1772) 25  
Further information:

Corsi's classification: Class 14. Quartz and its varieties; Species 6. Jasper; ii. Italian jaspers  
Corsi's text: 189.22 Diaspro del Piano de'Magli... di Sicilia  

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