Union of the words 'petros', stone, and 'ikhôr', which in Greek mythology was the liquid that flowed through the veins of the gods instead of blood. "Petrichor", smell that derives from an oil exuded by certain plants during periods of drought and that adheres to rocks, floors and walls. When it comes in contact with the raindrops it is released into the air. At that moment we perceive the "petrichor", that smell of rain that we all keep in our memory. The images of stones, floors and walls have been made in times of drought and those of vegetation during or immediately after the rain.