gold黄金;white gold白金;alloy合金;palladium钯金;titanium钛金;platinum铂金;silver白银;purity黄金纯度;Karat=K黄金的纯度单位;sterling silver纯银;diamond钻石;carat克拉(钻石等珠宝的重量单位);amber琥珀;amethyst紫水晶;sapphire蓝宝石;ruby红宝石
