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)
Silver	619	16,867	3.67% of all Silver deposits have Tungsten.	22.42% of all Tungsten deposits have Silver.
Copper	582	14,810	3.93% of all Copper deposits have Tungsten.	21.08% of all Tungsten deposits have Copper.
Gold	556	30,310	1.83% of all Gold deposits have Tungsten.	20.14% of all Tungsten deposits have Gold.
Lead	405	12,232	3.31% of all Lead deposits have Tungsten.	14.67% of all Tungsten deposits have Lead.
Molybdenum	365	1,950	18.72% of all Molybdenum deposits have Tungsten.	13.22% of all Tungsten deposits have Molybdenum.
Tin	272	1,335	20.37% of all Tin deposits have Tungsten.	9.85% of all Tungsten deposits have Tin.
Zinc	250	7,780	3.21% of all Zinc deposits have Tungsten.	9.05% of all Tungsten deposits have Zinc.
Antimony	139	1,683	8.26% of all Antimony deposits have Tungsten.	5.03% 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, ferberite, the iron tungsten oxide, and hübnerite, 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.