If a rudraksha of any mukh gets a protrusion on its body similar to the trunk of an elephant, this rudraksha is called a Ganesh rudraksha. The bead resembles Lord Ganesh with his trunk. The rudraksha also blessed by Ganesh.
Some people get obsessed with the image of Ganesh in rudraksha to such an extent that they look for the contours on the surface of any rudraksha resembling Lord Ganesh. Practically, only such rudraksha is called Ganesh Rudraksha, which has a trunk-like elephant on its body.
Om Tryambakam Yajaamahe Sugandhim Pushti Vardhanam Urvaa rukmiva Bandhnaan Mrityormuksheeya Mamrataat
Its meaning is as follows:
“0 Lord Shiva, you are a three-eyed Trayambakeshwar and as you can see and change future destiny, I pray to you as per the following: Please make me physically and mentally strong and full of good qualities so that I as a body and soul become a symbol of good human qualities and spread good virtues (sugandh) and strong will (pushti).
“As I mature and become older, I may ripe and face death so naturally and painlessly, the way a water melon detaches itself from the plant after it gets ripened (in terms of taste and flavour) without even letting the leaf next to it, knowing about it. After death, I should get the Nirvana or Moksha so as to get out of the cycle of birth and death. This way, I shall get the nectar of eternal peace.”