The Haeckels Rain Candle. Petrichor the scent of rain on dry earth , or the scent of dust after rain. The word is constructed from greek, petros, meaning ‘stone’ ichor, the fluid that flows in the veins of the gods in Greek mythology. It is defined as “the distinctive scent which accompanies the first rain after a long warm dry spell” Made with a high quality woven cotton wick and eco friendly soy wax in a thick glass surround.