1rudis6, of yellowish green, yellow, purple, black, or
outside red and inside
gold colour. These must be reckoned as the richest ores, because the gold
exceeds the stone or earth in weight. Next come all gold ores of which each.
one hundred librae contains more than three uncíae of gold7; for although but
a small proportion of gold is found in the earth or stone, yet it equals in value
other metals of greater weight.8 All other gold ores are considered poor, because
gold colour. These must be reckoned as the richest ores, because the gold
exceeds the stone or earth in weight. Next come all gold ores of which each.
one hundred librae contains more than three uncíae of gold7; for although but
a small proportion of gold is found in the earth or stone, yet it equals in value
other metals of greater weight.8 All other gold ores are considered poor, because