Where there is Rare metals

Where there is Rare metals? For many people, Rare metals is unfamiliar, and here's the introduction

Rare metal, refers to those who find late, the formation of independent minerals, and is often associated with a variety of element, is fragmented, and not easy purification of some metal. Rare metal with a total of 50 kinds of can be divided into the following five "race" : light rare metals, rare metals, refractory radioactive rare metal, scare metal and rare earth metals.