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Message: <blockquote data-quote="Celebrim" data-source="post: 8680678" data-attributes="member: 4937">The Dragon Magazine article (in Issue #152) extends those rules to cover weight ore mined as well as the purity of the ore.To simulate, you'd still need to do things like determine the thickness of the ore vein in order to get a ratio of ore to stone mined (that is, some estimate of how many cubic feet of stone you have to remove per cubic foot of ore you mine) and you'd still need to figure out how much ore is present (usually measured as how many man weeks it would take to remove the ore at an average rate if you didn't also need to remove "worthless" stone).  One complication I think you'd run into is that in the real world the very purest veins described in the Dragon Magazine article probably aren't very big so you might put your finger on the button of how much metal is present if you roll a very large and very pure vein of say gold, as it's quite possible to generate from the combination of both rules a single vein of gold containing campaign altering amounts of metal.</blockquote>