The first records of this mineral are dated back to 1765, but it received its current name only in 1985. It is a conglomerate of calcite, marble, pyrite, and fragments of ammonites and other ancient sea life forms. It was mostly formed in the Cretaceous period, 95-65 million years ago. Its hardness is 3.5 – 4.5. The color is caused mostly by the presence of iron or manganese.
Simbircite is believed to accumulate vital energy, absorb negative energy and help to get rid of indecision and suspiciousness. It is a stone of self-assured people, it alleviates fear, calms and clears the mind, strengthens memory, promotes emotional balance and self-checking.