Ruthenium (Ru #44) is the next element on the periodic table for my APEX mineral collection.
Ruthenium Minerals - There are extremely few Ruthenium minerals. It only exists in microscopic quantities combined with other platinoid metals (Iridium, Osmium, Platinum). I gave up trying to get my APEX mineral for Ruthenium.
Ruthenium is exceedingly rare and its annual production is only about 20 tons.
Ruthenium is one of the six Platinum Group Metals. These are precious metals which have similar physical and chemical properties, and tend to occur together in the same mineral deposits.