Few rocks on the planet have a formation as impressive as the one that gives rise to the Bronzite.
In the very distant past, between 2.8 and 2.5 billion years ago, the earth's first forms of life began to develop and transform the conditions of the atmosphere. Oxygen, which was previously unavailable, came to be supplied by cyanobacteria through photosynthesis.
This newly arrived oxygen on the planet reacted with the large amounts of iron present in seawater, which were released by the intense activity of underwater volcanoes of the period. This reaction formed iron oxides that sank to the ocean floor giving origins to layers of iron. When the amount of oxygen or iron available decreased, these reactions ceased, and layers of silica were deposited along the layers of iron. The repetition of this cycle gives rise to what we see today in the striking form in the beautiful plates of the Bronzite.
Once formed, the Bronzite went through several geological events of great importance and accompanied the entire evolution of the Earth, being moved, and metamorphized, until it was found in the north of Bahia. The iron present in the Bronzite is responsible for its high hardness and its reddish colors, often vivid and bright.