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
