Corsi Collection of Decorative Stones

view of stone 795

Corsi 795, approx. 145 x 73 x 40 mm, © Oxford University Museum of Natural History

OUMNH Number: 795  
Name and quarry location: Swedish porphyry, from Älvdalen, Dalarna, Sweden  
Geological description: Lamprophyre (minette group). Poikilocrysts of brown (?kaersutitic) amphibole up to 25mm enclosing subhedral crystals of pyroxene, feldspar and opaque mineral. Groundmass contains carbonate and possible feldspathoid.  
References: Geonord (n.d.); Porfyr Museet (n.d.); Price (2007) 205  
Further information:

Corsi's classification: Class 15. Porphyry; Species 1; ii. Italian porphyries  
Corsi's text: 196.7 Porfido di Svezia  

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.