Corsi Collection of Decorative Stones

view of stone 790

Corsi 790, approx. 145 x 73 x 40 mm, © Oxford University Museum of Natural History

OUMNH Number: 790  
Name and quarry location: Porfido Trentino, porfido Atesino, from Bolzano area, Trentino-Alto Adige, Italy  
Geological description: Pophyritic rhyolite with phenocrysts of quartz, feldspar and biotite.  
Comments: This porphyry, an ignimbrite deposit from the Permian Atesino-Cima d'Asta volcanic complex, is also known as porfido Atesino. It is one of a number of porphyries still quarried in the area around Bolzano, and all known as porfido Trentino.  
References: Andreolli (2003-4); Price (2007) 204  
Further information:

Corsi's classification: Class 15. Porphyry; Species 1; ii. Italian porphyries  
Corsi's text: 195.2 Porfido delle Alpi  

Full entry in English

Enter some search terms
Show results as:

search tips

Searches the database for all stone records containing the words you enter. To search for a text string, put it between quotation marks. To search for stone records that don't contain a word, put a minus sign in front of it.

For example, entering: granite "coarse-grained" -Egypt will find all the coarse-grained granites that do not come from Egypt.

Terms of three characters or less have not been indexed.