In a complete disregard for the rare minerals, Rajasthan government has leased mining blocks that contains copper, silver and tin for extracting masonry stones and construction materials.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/rajasthan-govenment-leases-mining-blocks-rare-minerals
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/times-india-jaipur
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/rajasthan
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/mining
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/minerals
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/stone
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/geological-survey-india-gsi