25125
Formerly it was obtained almost exclusively from the area of Miass in the Ilmensky Mountains , 50 miles southwest of Chelyabinsk , Russia , where it occurs in granitic rocks .
 Miass, Ilmensky Mountains, Chelyabinsk, Russia
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Miass, Ilmensky Mountains, Chelyabinsk, Russia