platinum

The chemical element with atomic number 78 and symbol Pt; a dense, malleable, ductile, highly unreactive, silverish-white transition metal of great value.

A whitish grey colour, like that of the metal.

A single or album that has achieved platinum sales, i.e. over 1 million or 2 million.

To reach platinum level in a game

“I platinumed in Clash of Clans yesterday.”

Of a whitish grey colour, like that of the metal.

Of a musical recording that has sold over one million copies (for singles), or two million (for albums).