Jewelry Metals M Club Jewelry is available in various metals refer to the list below for metal descriptions. Pure Gold: Pure gold is always blended with other metals to achieve durability and luster. The measure of gold content in this allow is expressed as karat (K)- with 24 kararts being pure gold. 14K Yellow Gold: (14/24ths pure) 58% fine gold; 24% fine silver; 17% Copper; 1% zinc. 14K White Gold: (14/24ths pure) 58% fine gold; 24% fine silver, 17% Copper; 1% zinc. 10K Yellow Gold: (10/24ths pure) 42% fine gold; 40% copper; 12% silver; 6% zinc. 10K White Gold: (10/24ths pure) 42% fine gold; 33% fine silver; 17% nickle; 8% zinc. Super Silver: Traditional sterling was too soft, tarnished and wore rapidly. A new (and patented) line is now available. While maintaining the 92-1/2% pure silver content, the super silver is 10% harder and tarnish resistance in greatly enhanced. Aztec Gold: Has an 18% gold content but the Stamp Act disallows any karat gold markings under 10K. White Aztec: A proven blending of alloys that produce tremendous strength and great brilliance in a white (only metal.