WHICH ARE THE PRECIOUS METALS?
These metals are GOLD, SILVER, PALLADIUM, RHODIUM and PLATINUM. 24k gold or 999 thousandths is soft. For having 18k gold or 750 thousandths for working and make jewels it’s necessary to make a silver and copper alloy . Then, the gold is strong and ductile. White gold it’s the result for a 24k gold and palladium alloys. Palladium function is discolouring the gold. It is frequent submerging the white gold jewels in rhodium, for being whiter.