金、银、铂、钯、铑,均为制作首饰品的贵金属。既然称之为贵金属,那么何谓之“贵”呢?诚然“物以稀为贵”。如果这些贵金属比其它金属在自然界分布更多,开采更容易的话,那么就很难冠以之“贵”了。永葆灿烂光彩的黄金,自古以来,一直受人珍爱,也是由于它的产量甚少,只要在一吨金矿沙里含有几克黄金或十几克就有工业开采价值了。尽管黄金如此难得,可却有不少幸运儿从矿砂中找到一定重量的天然金块,世界上最大的天然金块,重达7560盎司被 Gold, silver, platinum, palladium, rhodium, are the precious metals used to make jewelry. Since it is called precious metal, what is meant by “expensive”? It is true that “rare things are precious.” If these precious metals are distributed more in nature than other metals and mining is easier then it is hard to crown them. The glittering gold, everlasting and cherished, has been cherished by men since ancient times, and also because of its low yield, as long as it contains several grams of gold or a dozen grams of gold in one tonne of gold, there is industrial exploitation. Although gold is so rare, there are a lot of lucky people to find a certain weight of natural gold from the ore, the world’s largest natural gold nuggets, weighing 7560 ounces