Jai Sri Ganesha,
Three essentials for worship of Lord Shiva are,
Bhasma, Rudraksha and Panchakshari {Naam Jaap},
Their material truth matter yet their Manasa Sankalp equally qualified for Puja,
Indeed they indicate fair evolution of self unto truth of Triguna for a fair compliance unto truth of journey with respective composition,
May Lord bless all,
Thanks please