These are metals that include gold, silver, platinum as well as palladium that are majorly used as units of trade. All the mentioned metals have a specific kind of value in the industrial sector. Metals such as silver are regularly used in quite a good number of companies. People buy these metals for economic purposes and values. It is significant to note that these metals are very rare, and this is what makes them worth. As far as History is concerned, the metals were used as currency and got featured in jewelry.
