Although it is relatively abundant compared with other elements such as copper, it is not found in a pure state but as a minor fraction in various minerals. Most rubidium is derived as a by product of ...

As of November 28, the price for 99%+ purity rubidium carbonate was US$1205/kg, which equates to around US$1.205 million per metric tonne. Compare that to 99.2% pure lithium carbonate at US$10,319 ...