Good old Ag, always in second place but a vital part of human civilization for thousands of years. Silver is often overlooked in favor of gold or even platinum, but this versatile metal can also act as a safe haven, fuel jewelry and electronics industries and much more. But silver mining companies can also be versatile, extracting more than one type of precious metal or mineral as well as the shiny white substance – so which ones are a good investment? This Spark lists out the biggest US-listed players in the silver mining industry, with a minimum market cap of $1bn. But remember to dig deep and do your own research. This is not advice.