e/Metal prices

Information
has gloss	eng: Metal prices (metal commodities) are only for a few metals quoted on exchanges. Only Aluminium Alloy, Aluminium, Copper, Lead, Nickel, Tin, Zinc and Nasaac (North American special Aluminium alloy) are exchange traded commodities. Other metals (like Bismuth, Selenium, Tellurium and many others) are traded on market demand and the buyers/sellers themselves set the price.
lexicalization	eng: Metal prices
instance of	e/Commodity market