Iridium

[Sarah]

A rare metallic element, of the same group as platinum, whichit much resembles, being silver-white, but harder, and brittle, andindifferent to most corrosive agents. With the exception of osmium,it is the heaviest substance known, its specific gravity being 22.4.Symbol Ir. Atomic weight 192.5.

[Tina]

a very hard yellowish-white metal

[Marquetta]

The chemical element of atomic number 77, a hard, dense silvery-white metal.