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From greatest to least dense the value categories are: Ultra High, Very High, High, Decent, Poor, Very Poor. This is followed by a number in parenthesis, which is parts per thousand ([https://en.wikipedia.org/wiki/Per_mille per mille] - note there are two zeros below the slash, ‰, as opposed to a normal percent sign, %, which has one zero below). | From greatest to least dense the value categories are: Ultra High, Very High, High, Decent, Poor, Very Poor. This is followed by a number in parenthesis, which is parts per thousand ([https://en.wikipedia.org/wiki/Per_mille per mille] - note there are two zeros below the slash, ‰, as opposed to a normal percent sign, %, which has one zero below). | ||
Different ores will have drastically different density descriptors for the same ‰ reading. For instance Deep Copper, Coal, and Sulfur will have Very High densities at around 18‰ and Very Poor below 5‰ | Different ores will have drastically different density descriptors for the same ‰ reading. For instance: | ||
* Common ores like Deep Copper, Coal, and Sulfur will have Very High densities at around 18‰ and Very Poor below 5‰ | |||
* Rare ores like diamond and emerald will be Very High at around 1.0‰ and Very Poor at 0.2‰ | |||
===Prospecting for Ore Fields=== | ===Prospecting for Ore Fields=== |