A freshly cleaned Rudraksha is pale, dull and often a little rough. The bead a buyer sees is usually darker, glossy and uniform in colour, because between the tree and the shop it has been treated. Some of that treatment is ordinary care; some of it is disguise. A laboratory describes what it finds on the surface so that the buyer knows which.
Cleaning
The fruit flesh is removed by soaking and scrubbing, and the residual fibres are brushed out of the grooves. This is necessary and harmless. Beads that were poorly cleaned retain dark, matted material in the grooves that can be mistaken for staining.
Oiling
Beads are soaked in or wiped with oil — traditionally mustard or sesame, sometimes mineral oil — to darken the surface, prevent drying and cracking, and give a soft sheen. Oiling is near-universal and, in moderation, is good for the bead. It does change weight and colour, which is why a bead may weigh slightly more than a report taken before oiling.
Heavy oiling has a second effect: it fills fine cracks and softens the contrast between natural and carved surfaces. A bead that arrives at the laboratory saturated in oil is cleaned with a solvent-dampened cloth before examination so that the true surface can be seen.
Polishing
Mechanical polishing — tumbling, buffing or hand-rubbing with abrasive — smooths the tops of the surface ridges and produces a high gloss. It removes material, rounds off the natural ornamentation and can shallow the grooves. A heavily polished bead loses some of the surface detail an examiner relies on, and polishing is occasionally used deliberately for that reason: to blur the difference between a natural groove and a carved one. Light polishing is cosmetic; heavy polishing is noted on the report as a surface alteration.
Staining and colouring
Dyes, stains, and coloured oils or waxes are used to darken pale beads, unify the colour of a mala, or — on carved beads — bring the pale freshly cut grooves up to the colour of the rest of the surface. Under magnification, stain concentrates in pores, cracks and tool marks and shows uneven density; under UV, some stains fluoresce. A bead whose grooves are conspicuously darker than its ridges has been stained, and the reason is worth asking.
"Antique" and "aged" beads
Some beads are sold as old — decades or generations of wear — with a deep dark colour and a worn, smooth surface. Genuine long-worn beads do develop this appearance. So do beads that have been boiled in oil, dyed, tumbled and waxed over a weekend. There is no laboratory test for the age of a bead, and a report will describe the surface — dark, smooth, heavily oiled — without endorsing any claim about age.
Wax and varnish
A coating of wax or clear varnish gives a permanent gloss and seals the surface. It is easily detected (it flakes, it fluoresces, it dissolves in solvent) and it prevents the bead from being examined properly until removed. Coated beads are cleaned before testing.
How the report describes the surface
A careful report notes colour, gloss, the presence of oil or coating, evidence of polishing or staining, and the condition of the grooves. It separates surface condition from identity: a heavily polished, stained bead can still be a genuine seven-mukhi, and the report says both. What the buyer should look for is whether a surface treatment is hiding something — carved grooves, filled cracks, a join — and that is what the magnified examination and X-ray answer. Real vs fake Rudraksha: the complete identification guide.
Frequently asked questions
Is oiling a Rudraksha bad?
No. Light oiling protects the bead and is traditional. Heavy oiling is unnecessary and complicates examination.
Does polishing damage a Rudraksha?
Light polishing is cosmetic. Heavy polishing removes surface material and detail, which is both a loss in itself and a reason to examine the grooves more carefully.
Can a laboratory tell how old a bead is?
No. Surface wear and colour can be produced artificially, and there is no dating test for a dried seed of this kind.
Why are the grooves on my bead darker than the rest?
Either residual fibre from cleaning, or stain applied to darken pale cut surfaces. Under magnification the two look different, and the second is a reason to check the grooves for carving.
Should I remove oil before sending a bead for testing?
Not necessary. The laboratory cleans the surface as needed and will note the treatment on the report.