Maybe the hypothetical "market price" of gold works that way, but in practical selling and buying provenance can be used as a shortcut for independently determi

Maybe the hypothetical "market price" of gold works that way, but in practical selling and buying provenance can be used as a shortcut for independently determining purity. If you want your buyer to just accept your "gold" without testing, if you have gold without provenance, you're just going to have to accept a discount on your sale. Consider the difference between "merely" 99% and 99.99% gold. On a 1oz coin, that's like ~200USD of value right there.