CABOCHON CARVED IN THE FORM OF OVAL 28 X 15 X 8 Stromatolite, in black color, with certain lighter colors in brown, worked by our artisan hands, round case methacrylate transparentem 4 x 4 x 4 with lid, magnetic closure, silver color, in a white cloth, to emphasize, that jewel, and to be enshrined in silver 925, to show off a beautiful colgante.Los Stromatolites, exhibit a variety of shapes and structures or morphologies, including conic , branches, Domal, they, occur widely in the Precambrian fossil record, but these are rare today. They are very little today, those containing fossils microbios.-