Hallmarking also known as assay or standard marking is the official quality control mark that determines the purity of gold and other precious metals.
The stamp or etch 14kt and 14K all mean 14 karat gold; authentic gold jewelry should have a stamp to show the purity of the gold in the piece. PC could either mean Gold Plated on Copper or may be a designation as "Plumb Gold Coinage."
The second mark can also be the maker’s mark or a jeweller’s stamp; sometimes they are letters or initials (like “P C”), and sometimes they are ornate icons (like a heart or a bell, for example).
What Does Gold Marking 14K PC Mean? - OC GOLD® - Orange County Cash For Gold Buyers : Cash For Gold, Orange County Gold & Silver Coin Dealer - Cash for Gold, Gold Buyer, Sell Gold, Cash 4 Gold, Jewelry Buyer, Silver Buyer, Coin Buyer, Gold Seller, Gol... via kwout
The Hallmarking Act 1973 stipulates the use of symbols to identify the precious metal, like for 14 carat gold which is marked 585; this millesimal stamp number tells us the precious metal content.
From Reuters, gold has already lost nearly a quarter of its value this year amid speculation the U.S. central bank will start rolling back its $85-billion monthly bond purchases soon. Find out more here.