Ingots

Ingots are not just metal. They come in all shapes, sizes, and elements. So don't say you can't have a oxygen ingot! that exists! And clay ones! About any material has an ingot!

Caps
All ingots wear caps, and they have the chemical symbol (or formula) on them.

Exceptions
there are some exceptions. such as...
 * Palladium looks like gold, not platinum.
 * Cobalt, Osmium, Iridium and Titanium are blue.
 * Rhodium and Ruthenium are Red.
 * Mercury and Bromine are liquid.
 * Cadmium and Sulphur are yellow.
 * Americium looks like a vertical USA flag, but with purple instead of blue.
 * Plutonium is Purple.
 * Uranium is green.
 * Clay is brown.
 * Silicon is Black-silver.
 * Corundum is a dirt colour.
 * Moonstone is white.