Corsi Collection of Decorative Stones

| return to catalogue
view of stone 995

Corsi 995, approx. 145 x 73 x 40 mm, © Oxford University Museum of Natural History

OUMNH Number: 995  
Name and quarry location: Granito antico, locality unknown  
Geological description: Porphyrtic trachyte. Abundant feldspar phenocrysts up to 15mm showing complex twinning, concentric zoning of inclusions and a tendency to cluster. Sparse microphenocrysts of amphibole substantially altered to rusty brown mineral (also occurs in the white feldspars). Possible rare quartz phenocrysts. Groundmass of milky-white and pale grey feldspars showing tendency to fluidal structure round phenocrysts. Occasional angular (?cognate) xenoliths of fine-grained equigranular rock consisting of feldspar and altered amphibol;e.  
Comments: This has not been identified as coming from Egypt.  
References:  
Further information:
 


Corsi's classification: Class 16. Granites; i. Antique granite  
Corsi's text: 210.42/ S27.10 Altro [Granito antico]  

Full entry in English

| return to catalogue
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.

Funded by Esmée Fairbairn Foundation Oxford University Museum of Natural History University of Oxford