Corsi Collection of Decorative Stones

view of stone 508

Corsi 508, approx. 145 x 73 x 40 mm, © Oxford University Museum of Natural History

OUMNH Number: 508  
Name and quarry location: Pietra paesina, from Civitavecchia, Rome, Lazio, Italy  
Geological description: Micritic limestone or calcareous marl from the Cretaceous-Eocene Alberese Formation. Calcite-filled microfractures control iron-staining. Some dendritic manganese oxides emanate from the fractures.  
Comments: This most probably comes from the Tolfa Mountains a few miles north of Civitavecchia, an occurrence of pietra paesina described by Civitelli in 1970. Pietra paesina has been found in the Monterano nature reserve. This sample has 'Arg....' [Argilla?] in ink on reverse of specimen but mainly covered by the painted-on specimen number.  
References: Civitelli et al (1970); Marko (2003); McBride (2003); Price (2007) 101-103  
Further information:

Corsi's classification: Class 1. Marbles; Section 6. Argillaceous stones; i. Common clays  
Corsi's text: 128.9 Argilla di Civitavecchia  

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