Eighteen Mukhi Rudraksha is a bead which is very popular in itself. The Eighteen Face Rudraksha have eighteen lines originating from top to bottom. Eighteen Mukhi Rudraksha represents mother Earth, i.e. Bhumi. Earth is called Bhumi because residential building (bhawan) can be constructed on it.
As per Epics, Earth was born from the sweat of Madhu and Kaitabh. It is said that their sweat of Madhu and Kaitabh got dehydrated as a result of the heat of the sun. So Earth is also called Medani. Earth that offers motherly love care and affection to every one- be it plants, animals, or any matter on it.