To encourage the search for mines the royal contract with Menendez allowed 10 years (from the date of first smelting) during which the quinto on bullion was to be reduced to a tenth. In spite of all efforts, however, no mines were discovered, either of minerals or of gems. Soldiers told tales around the campfire of the great Moyano diamond, but the multicolored mountain from which it came was never seen again. (Bushnell KC)