Corsi Collection of Decorative Stones

view of stone 342

Corsi 342, approx. 145 x 73 x 40 mm, © Oxford University Museum of Natural History

OUMNH Number: 342  
Name and quarry location: Lumachella di San Vitale, from the province of Verona, Veneto, Italy  
Geological description: Fossiliferous biosparite limestone with large fragments of 'lithiotis' bivalves. Original aragonite shells are replaced by sparry calcite. Some primary prismatic calcite survives. Note the calcite filled fractures and stylolites.  
Comments: This is an example of lumachella di San Vitale, a Lower Jurassic limestone containing the elongate sparry calcite-filled shells of the reef-forming bivalve Lithiotis. It is named after the village of San Vitale di Roverè, a source cited by both Pollini (1817, 1825) and Jervis (1889), but was also obtained from other locations in the Anguilla, Squaranto and Pantena valleys of Verona, as well as other places to the north and east. It is not an alabaster, and would not have come from Monte San Primo, in the Brianza region north of Milan.  
References: Antonelli (2003); Fraser (2004); Jervis (1889) 144; Price (2007) 168  
Further information: Verona.pdf

Corsi's classification: Class 1. Marbles; Section 4. Concretionary marbles; Species 1. Alabasters; ii. Italian alabasters  
Corsi's text: 99.9 Alabastro screziato di S.Primo, nel Milanese  

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