Mary Ellen Stromatolite (Jasper) Source: Mary Ellen Mine, Mesabi Iron Range, Minnesota, USA Its name comes from the Mary Ellen Mine on the Mesabi Iron Range in northern Minnesota USA where it was first discovered. This 2.1 billion years old Jasper contains Precambrian fossil algae also known as Stromatolites ( iCollenia Undosa ). Stromatolites are stony structures built up by algae and cyanobacteria. The microbes live in gooey mats on the top surface of the structures. These mats trap fine sediments carried across them by tidal currents. As the mats fill in with sediments and become opaque, the microbes move upwards seeking sunlight. Stromatolites differ from normal fossils because they are formed by the activities of micro-organisms. Mary Ellen Stromatolite is a stone that brings about insightful healing from deep within the earth, reducing stress levels and activating positive energies for an emotional improvement. These stones are a very useful aid in past life recollection, shamanic journeying, and regression. It is an excellent stone for introspective meditation.