Rudraksha is a seed traditionally used as prayer beads in Hinduism
The seed is produced by several species of large evergreen broad-leaved tree in the genus Elaeocarpus, with Elaeocarpus ganitrus being the principal species
They are associated with the Hindu deity Lord Shiva and are commonly worn for protection by his devotees. The seeds are primarily used in India and Nepal as beads for organic jewellery and malas, and are valued similarly to semi-precious stones. Various meanings and potencies are attributed to beads with different numbers of segments (faces), and rare or unique beads are highly prized and valuable
Rudraksha is a Sanskrit compound consisting of the name Rudra ("Shiva") and akṣa ("Teardrops").
Mukhi in Sanskrit means ("mukh") which is ("face"). So Mukhi means opening on Rudraksh, Like one Mukhi Rudraksha means Rudraksha with one mouth or opening, 7 Mukhi Rudraksha means Rudraksha with 7 mouths or opening.
A Rudraksha's surface should be hard and the projections should be well grooved, as found in most of the Nepalese Rudrakshas. Indonesian Rudraksha has a different appearance. Rudraksha from India shows very high and deeply grooved projections resembling natural deep hills and valleys.
Sometimes an incomplete groove is completed by human process to increase the sellability of the bead or to fetch more value. Such work on grooves is done with basic tools like saw blades, files, etc. A Rudraksha face should be naturally formed not made by any human effort; if any Rudraksha has any modified faces, those faces should not "count", and the bead should be classed as Modified or Tempered Rudraksha.