It’s the same for all karats. Gold is either marked with the karat (8k, 10k, 12k, 14k, 18k, 21k, 22k, and anything in between) or with the percentage (334, 417, 500, 585, 750, 875, 917)…. If your item says “1/20 12k ” then it is not twelve karat gold, it is merely plated in 12k gold. Apr 9, 2013