1、众所周知,18K金是以75%的黄金再加上25%的其他"杂质金属"熔炼而成的.由于25%的杂质金属的种类和相互之间的配比不同,就可炼制出不同颜色的18K金. "玫瑰金",就是带有玫瑰色的18K金.现将18K金的颜色和杂质金属列举如下,以供参考. 18K金的颜色 黄 含杂质金属 银,铜. " " " " 粉红 " " " " " 银,铜. " " " "玫瑰红" " " " " 铜. " " " " 红 " " " " "铝. " " " " 白 " " " " " "银,锌,镍. " " " " 绿 " " " " 银,镉,铜. " " " "深绿 " " " " 银,镉,铜. " " " " 蓝 " " " " 铁. " " " " 褐 " " " " 钯,银. " " " " 灰 " " " " 铜,银. 18K金饰品,本来只含75%的黄金,理应价格比足金(含金量为99%)和千足金(含金量为99.9%)便宜,可是因为加工工艺复杂,其单价常比足金和千足金的饰品还高. 一般说来,18K金的饰品是以"件"来销售的,如这条(18K金)项链XXX钱,那条是XXX钱,等等.在交易过程中并不是称重量再乘以单价来计算的. 18K金饰品,一般来说升值空间不大.