>>11178746nah, most metals dissolve in it, some don't because they form insoluble chloride salts, some don't because nitric acid simply doesn't oxidise the surface layer/the hydrochloric acid can't dissolve the oxide level
thing is, tungsten is near density of gold, with there being little to no cheaper metals that are heavier than gold
sufficient electroplating can make the gold layer thick enough that somebody using that thing (unglazed ceramic or porculain iirc) to scrape a bit of surface off of gold plated metallic item, it would pass the test
the density is mostly the same
and you can't really bite gold that wasn't pre-heated
you need strong x-ray gun or destroy the item
