The name given to a metal discovered in 1803, by Sir H. Davy, associated with platina, among the grains of which he supposed the ore to exist, or an alloy of it, with irridium and osmium, scarcely distinguishable from the crude platina, though it is harder and heavier. The pure metal also very nearly resembles platina, and it takes as high a polish. It is ductile, very malleable, and, when reduced into thin plates, flexible, but not very elastic. It is harder and heavier than iron; its specific gravity is from 10.9 to 11.8.