Tertiary Minerals plc is mineral exploration and development company. The Company is engaged in identification, acquisition, exploration and development of mineral projects with primary focus on fluorspar. The Company's segments include Exploration Projects and Head Office. Its fluorspar projects include Storuman Fluorspar Project, which is located in north central Sweden; MB Fluorspar Project, which comprises approximately 150 contiguous mining claims covering an area over 2,800 acres and it is located 19 kilometers south-west of the town of Eureka in central Nevada, the United States, and Lassedalen Fluorspar Project, which is located near Kongsberg, 80 kilometers to the south-west of Oslo in Norway. The Storuman Fluorspar Project has indicated resources of approximately 30 million tons and inferred resources of over 2.7 million tons. The MB Property has indicated resources of approximately 6.1 million tons and inferred resources of over 80.3 million tons.