It is unaffected by common household chemicals and, unlike gold, does not get damaged or discolored by chlorine, bleach, or detergents. It is tougher than all precious jewelry metals, but still must be alloyed with stronger metals to prevent it from bending.
Natural platinum contains small amounts of the rare element iridium.
In jewelry, iridium is alloyed with the platinum to increase its toughness and durability. Gold is often mixed with platinum, giving it a light yellow hue. USES Platinum is the rarest and most expensive of the precious metals. Rings, bracelets, necklaces, and other jewelry figures are fashioned from platinum. It is usually the base metal for colorless or light blue gems.