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If I remember correctly from my days as a goldminer, when I sent gold to the mint for assay and sale they would return a cheque along with an assessment of the purity. My gold was always 98.5%pure with the impurity being silver hence this was called queensland gold. Italian, french etc is designated by the level and type of impurity of the original gold before it's strengthened with alloys to achieve 18k, 9k etc.
Basically, gold is gold is gold and all thie fancy names they give it is just a marketing ploy to make you enamoured of an inferior purity of gold.
Like 'white gold', sheesh.
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