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Discovery and occurrence It was first described in 1872 for an occurrence as druse on halite in the Kalusa Salt deposit , Ivanovo-Frankovsk Oblast ' , Ukraine .
 location: Ukraine
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 location: Ukraine