Tantalite
Minerals Tantalite, or coltan, is a key component in the building of electronic capacitors, which without this mineral, many electronic devices around the world would stop. More information
Columbite
Minerals Columbite is the most widespread niobium mineral and makes for an important ore of the industrially useful metal. More information
Wolframite
Minerals Wolframite is actually a series between two minerals: Huebnerite and Ferberite. More information
Monazite
Minerals The ore is mainly brownish-red and grayish-white, granular structure, massive structure More information