Biotite (giants lentil) in Portugal (rarely)

From a mineralogical point of view biotite lenses are so-called metamorphic mica aggregates. The mostly black-gray-brown lenses emerged during the mountain formation of Nordportugals. By heating the mother's rock in the summer, they inflate themselves lenticularly, burst the rocks and jump out of their own accord. Due to their origin and their use for obstetrics in earlier days, biotitic lenses are also called "bearers" in the founding area. In esotericism they stand for individual self-realization, are supposed to promote creativity and help to implement ideas more quickly and easily.Available in various sizes, as well as drilled or donated trailers.