What is "untarnishable"

Usage examples of "untarnishable".

Gold, the most beautiful as well as the most untarnishable metal, keeping its beauty permanently, unaffected by sulphur, most acids, and fire--indeed, purified by such treatment,--gold, to the alchemist, was the symbol of regenerate man, and therefore he called it "a noble metal".

The anteroom at the head of the stairs was solid, untarnishable silver, and beyond that was a corridor of the famous and colorful plastic opalescent.

I looked morosely at the solid untarnishable handcuffs locked round my wrists.

Base material such as lead was put through an elaborate series of processes (all of them involving, as Steven had said, heat) that led to its perfection into gold, while the alchemist, struggling over the years to perfect the process, was simultaneously being refined, purified, and ultimately transmuted into a being of untarnishable wisdom and immortality.