Platinum is even more scarce than gold. Only 3.6 million troy ounces are produced per year. Its specific gravity is 21.45, and it was discovered in the 18th century, not in 3,000 B.C. If you assume that the world has produced 3.6 million ounces per year for 50 years to estimate the total worldwide supply, all of the platinum in the world would fit in a cube that is 6.3 meters (about 20 feet) on a side. In other words, all of the platinum in the entire world would easily fit in the average home!