Tungsten

It is used in applications such as light bulb filaments, x-ray tubes, welding, superalloys, and radiation shielding. It also has use in military sectors (in penetrating projectiles), in industrial catalysts, and more.

Commodity	Associated Localities	Total Localities	% Association (commodity)	% Association (Tungsten)
Copper	719	18,193	3.95% of all Copper deposits have Tungsten.	21.28% of all Tungsten deposits have Copper.
Silver	689	19,203	3.59% of all Silver deposits have Tungsten.	20.39% of all Tungsten deposits have Silver.
Gold	640	34,916	1.83% of all Gold deposits have Tungsten.	18.94% of all Tungsten deposits have Gold.
Molybdenum	492	2,563	19.20% of all Molybdenum deposits have Tungsten.	14.56% of all Tungsten deposits have Molybdenum.
Lead	452	14,162	3.19% of all Lead deposits have Tungsten.	13.38% of all Tungsten deposits have Lead.
Tin	443	1,885	23.50% of all Tin deposits have Tungsten.	13.11% of all Tungsten deposits have Tin.
Zinc	305	9,420	3.24% of all Zinc deposits have Tungsten.	9.03% of all Tungsten deposits have Zinc.
Antimony	149	1,924	7.74% of all Antimony deposits have Tungsten.	4.41% of all Tungsten deposits have Antimony.

* in exploitable quantities, based on associations listed on mindat.org

The primary ore of tungsten is wolframite, which is a series between two mineral species, ferberiteFeWO₄, the iron tungsten oxide, and hübneriteMnWO₄, the manganese tungsten oxide.

Deposits of wolframite are generally from magmatic or hydrothermal origin. Concentration of workable ores is usually between 0.3% and 1.0% WO₃.

Scheelite, another important ore or tungsten, is a calcium tungstate and can be found in contact metamorphic skarns, high-temperature hydrothermal veins/greisens and occasionally in granitic pegmatites.