Onyx is used as jewelry to finish the mask, to frame, to decorate, so the design. Its chemical formula contains silicon dioxide, oxygen, and iron.

Silicon is a mineral that provides reinforcement at the level of the skin, nails, connective tissue and bones. It stimulates calcium metabolism and it activates the lymph nodes, the spleen, the lungs and the immune system. It is also anti-inflammatory.
It has a stimulating effect on cell metabolism and cell parts. It promotes the healing process of wounds and scars.

Oxygen is the element that nourishes all combustion processes in our body. Therefore, it is the energy provider in all cells, tissues and organs. 

Iron activates the iron absorption in the small intestine, production of hemoglobin in the red blood cells.  It enhances the immunity process.