Hard, silver-white, metallic element, atomic number 45, relative atomic mass 102.905. It is one of the so-called platinum group metals and is resistant to tarnish, corrosion, and acid. It occurs as a free metal in the natural alloy osmiridium and is used in jewellery, electroplating, and thermocouples.
The triangle represents equality and the rainbow signifies peace. The arms may be replaced by the motto Dios, Union, Libertad, ‘God, Union, Liberty’. Effective date: September 1972.