The only metal quarried in British Columbia prior to explorers and settlers arriving to the province was copper. Gold was introduced during the mid-1800s in the form of coins, which would be hammered out, rolled, and then shaped for engraving. Most Northwest Coast First Nations jewellery made from gold is 14 karat because it is of a similar hardness to sterling silver. Gold jewellery is popular within this market due in part to the fact that it does not tarnish.