Physical Inspection: Shape and Texture: Genuine rudraksha beads have a distinct shape and texture, often with natural grooves (mukhis).
Seed Test: Check the inner seed. Genuine beads usually have a noticeable structure inside, while fake ones may be hollow or filled with resin.
Color and Finish: Natural rudraksha has an earthy color and does not have an artificial shine. Be cautious of overly polished or brightly colored beads.
Certification: Purchase from reputable sellers who provide certification or proof of authenticity.  and xray if possible.
Price Check: If the price seems too low compared to market value, it could be a sign of a fake.
Taking these steps can help you identify an authentic rudraksha bead.