An ounce of .999 troy silver is worth about $20 at current precious-metal prices. AnswerParty
Units of mass
Platinum as an investment
In physics, mass (from Greek μᾶζα "barley cake, lump [of dough]") is a property of a physical body which determines the body's resistance to being accelerated by a force and the strength of its mutual gravitational attraction with other bodies. The SI unit of mass is the kilogram (kg). As mass is difficult to measure directly, usually balances or scales are used to measure the weight of an object, and the weight is used calculate the object's mass. For everyday objects and energies well-described by Newtonian physics, mass describes the amount of matter in an object. However, at very high speeds or for subatomic particles, General Relativity shows that energy is an additional source of mass. Thus, any body having mass has an equivalent amount of energy, and all forms of energy resist acceleration by a force and have gravitational attraction.
There are several distinct phenomena which can be used to measure mass. Although some theorists have speculated some of these phenomena could be independent of each other, current experiments have found no difference among any of the ways used to measure mass:
Platinum has a much shorter history in the financial sector than either gold or silver, which were known to ancient civilizations.
Platinum is relatively scarce even among the precious metals. New mine production totals approximately only five million troy ounces (150 Mg) a year. In contrast, gold mine production runs approximately 82 million ounces (2,550 Mg) a year and silver production is approximately 547 million ounces (17,000 Mg). As such, it tends to trade at higher per-unit prices.
The troy ounce (oz t) is a unit of imperial measure. In the present day it is most commonly used to gauge the mass of precious metals. One troy ounce is currently defined as exactly 0.0311034768 kg or 31.1034768 g. There are approximately 32.15 troy oz in 1 kg. One troy ounce is equivalent to approximately 1.09714 avoirdupois ounces.
The troy ounce is part of the troy weights system, many aspects of which were indirectly derived from the Roman monetary system. The Romans used bronze bars of varying weights as currency. An aes grave weighed equal to 1 pound. One twelfth of an aes grave was called an uncia, or in English an "ounce". Later standardization would change the ounce to 1/16 of a pound (the avoirdupois ounce), but the troy ounce, which is 1/12 of a troy pound (note that a troy pound is lighter than an avoirdupois pound), has been retained for the measure of precious metals. At 480 grains, the troy ounce is heavier than the avoirdupois ounce, which weighs 437.5 grains. Since the implementation of the international yard and pound agreement of 1959, a grain has been defined as exactly 64.79891 milligrams (mg); hence one troy ounce is 31.1034768 grams (g) (exact by definition), about 10 percent more than the avoirdupois ounce, which is 28.349523125 g (exact).