Lord Ganesh is believed by Hindu's to be the remover of all obstacles.

Onyx has been thought to bring the qualities of protection, increased vigor, strength, stamina, and self control. It alleviates worry, tension, and nervousness and eliminates confusion and nightmares. It is used to provide glimpses of that which is ‘beyond’ and activates one’s memory of one’s roots and reality. 

One size fits all.

Black onyx beads with bronze Ganesh.