| OUMNH Number: |
738
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| Name and quarry location: |
Sicilian jasper, diaspro-agata di Giancavallo, from Feudo Giancavallo, near Bisaquino, Palermo, Sicily, Italy
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| Geological description: |
Brecciated jasper, clasts mainly yellow, in places altered grey-brown. Matrix of colourless crystalline quartz has some inclusions of iron sulphides on ghost faces. Agate is present as late stage infill within quartz matrix.
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| Comments: |
This matches a sample from Feudo di Giancavallo, near Bisaquino, Province of Palermo, in the collection of the Naturhistorisches Museum Wien. Tata (1772) describes this locality: 'un Feudo di S. Maria del Bosco de' PP. Olivetani detto Giancavallo presso Giuliana.' and later as ''Feudo Giancavallo di S. Maria del Bosco'. For more information about jasper-agates from this locality see see Montana (1998).
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| References: |
Jervis (1881) 193-318; Jervis (1889) 449-482; Montana & Briuccia (1998) 25, 32, 79; Price (2007) 246-247; Schmidt (2002); Tata (1772) 22, 29
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| Further information: |
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