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Image: Rob Lavinsky, i Silver has been in use since prehistoric times.
We do not know who discovered it, although the discovery would almost certainly have been of native silver.
Various radioactive elements are involved, including Carbon-14, Uranium-238, Thorium-232, and Potassium-40.
By the way, it is important to understand that most rock strata “dates” were actually assigned long before the first use of radioactive age estimating methods in 1911.
Galena actually looks metallic (see image) and would have caught the eyes of people looking for metals.
The silver objects found in Greece, Turkey and Kish were made of silver that was refined from lead-containing ores such as galena.
The Carbon-14 age estimating method is, at best, only useful for estimating the age of things that are thousands of years old, not millions or billions.
Galena generally contains silver, sometimes in significant quantities.Silver artifacts have been found in the Sumerian city of Kish dating from about 3000 BC.Silver and lead often appear together in nature, for example in the mineral galena which is mainly lead sulfide.Sterling silver (an alloy of 92.5% silver and 7.5% copper) or Britannia silver (an alloy of 95.8% silver and 4.2% copper) are used for jewelry and silverware.Silver is used as a food additive/coloring and is given the E number E174.
It has the highest electrical and thermal conductivity of all metals.