distinguished by any difference of form. The universal product of the social process or the social process itself as a product is a peculiar natural product, a metal hidden in the bowels of the earth and extracted therefrom.114
We have seen that gold and silver are unable to fulfill the requirements which they are expected to meet in their capacity of money, viz. to remain values of unvarying magnitude. Still, as Aristotle had already observed, they possess a more constant value than the average of other commodities. Apart from the universal effect of an appreciation or depreciation of the precious metals, the fluctuations in the ratio between the values of gold and silver has a special importance, since both serve side by side in the world market as money material. The purely economic causes of this change of value must be traced to the change in the labor-time required for the production of these metals; conquests and other political upheavals which exercised a great influence on the value of metals in the ancient world, have nowadays only a local and transitory effect. The labor-time required for the production of the metals will depend on the degree of their natural scarcity, as well as on the greater or less difficulty with which they can be obtained in a purely metallic state. As a matter of fact, gold is the first metal discovered by man. This is due to the fact that nature itself furnishes it partly in pure crystalline form, individualized, free from chemical combination with other substances, or, as the alchemists used to say, in a virgin state; and so far as it does not appear in that state, nature does the technical work in the great gold washeries of rivers. Only the crudest kind of labor is thus required of man in the extraction of gold, either from rivers or from alluvial deposits; while the extraction of silver presupposes the development of mining and a comparatively high degree of technical skill generally. For that reason the value of silver is originally greater than that of gold in spite of the lesser absolute scarcity of the former. Strabo’s assertion that a certain Arabian tribe gave ten pounds of gold for one pound of iron and two pounds of gold