Which metal should you choose?
Sterling silver is an alloy of silver containing 92.5% silver; highest propensity to tarnish.
10k gold has 41.6% gold; it has less luster but is the strongest against bending.
14k gold has 58.3% gold; it has medium hardness and durability, and a bright luster. It is the best value.
18k gold has 75% gold; it has the highest durability and a very bright luster.