Autor: Cetec-patrimoni
Aumentos: 10x
Descripción: Internal structure are observed following layers:
1: surface layer of brown tones people, yellow - Golden and black.
2: internal or core layer of gray and microcrystalline texture and compact.
3 Layer yellow - golden. It microcrystalline texture thick microporous.
4: Set of thin laminated layers composed of iron ore and waste wood.