Mineral resources are non-renewable.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/scientists-use-low-grade-ores
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/asian-age-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/scientists
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/minerals
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/mining
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/mining-research
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/coal
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/india
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/fly-ash