test tungsten purity
You test it by checking the melting point
The best and trusted way is by chemical test
Bisleri
monkey
Purity tests are used to determine the extent to which a particular substance is what is claimed. A classic purity test for gold is nitric acid; if the item being examined reacts to the acid it is not gold, or at least not pure gold.
A colour ink blot test a persons perception of what is visually seen to what the person's brain interprets.
Ephedrine can show a false positive for amphetamines on a drug test.
Density
by mohr's method
This is possible by chemical analysis.
burn it if its gold it want burn