Unusual shining stones were exposed in museum minerals

Along the coast of the Great Lakes State of Michigan are scattered curious rocks which are in appearance similar to usual stones, however it is worth lighting on them an ultra-violet lamp, and they start shining. In it there is the magic, but scientific: the fluorescent sodalite containing in these stones, does them such unusual. Yooperlita are known for a long time, however only now they received an own exposition in museum minerals State of Michigan where geologists designated their presumable age. It is considered that shining stones were formed 1,1 billion years ago, during break formation Kevinavan. When...