The cook pot, although thin and battered, had been metal, too valuable to be abandoned.

The chain was of copper, a valuable metal on Darkover.

The solution is collected and processed to extract valuable metals.

Additionally, a concentrate may contain more than one valuable metal.

That concentrate would then be processed to separate the valuable metals into individual constituents.

Steel is now the most valuable metal in the kingdom.

Recycling a computer usually means taking the valuable metals out of it and selling them.

They were in constant search for valuable metals like copper, gold, tin, and lead.

Such percentages for more valuable non-ferrous metals may be significantly greater.

Strangely, all around the lake can be found valuable metals and ores.