Caps are the small metal cups, usually silver or gold, fitted over the two poles of a Rudraksha and joined by a wire through the hole, so that the bead can hang from a chain. They are decorative, traditional in some regions, and protective of the poles in wear. They also cover the two places on a bead where the most important evidence of tampering appears — and a laboratory that receives a capped bead can examine only what the caps leave visible.
What the poles show
The crown. At the top pole, the mukhi grooves converge on a small raised crown. On a natural bead every groove reaches it. On a carved bead the added grooves commonly stop short, fade out, or meet the crown at an angle that does not match the natural ones. The crown is where carving is most often exposed.
The base. At the bottom pole the grooves converge again, and a carved groove that was cut from the top may not reach the bottom at all.
The hole. The channel through the bead. In a joined or assembled bead, the components' holes may not align, and the filler at the join is visible inside the channel. Drilling and filling are also seen here.
Seams on twins. A Gauri Shankar's waist is not at the poles, but a cap over one bead's pole can cover the end of a seam.
Capping covers the crown, the base and the hole's ends. A carver who knows the bead will be capped has less to fear from examination.
What the laboratory can and cannot do with a capped bead
Magnification of the exposed surface: the grooves between the caps can be examined for floor texture and seams, and much carving is still detectable. The groove ends are not visible.
X-ray. Metal caps are dense and appear as bright regions on the radiograph, obscuring the poles but not the body of the bead. The internal compartments can usually still be counted, which is the decisive finding. Thick gold caps and heavy silver mounts obscure more. How X-ray testing of Rudraksha works.
Weight and dimensions are of the bead plus caps, which cannot be matched to an uncapped report and cannot be compared with normal ranges for the bead's size. The report states the weight as capped.
Removal. Caps that are pressed or glued on can often be removed by a jeweller without damage, examined, and refitted. Caps that are soldered with a wire through the hole are harder. A laboratory will not remove caps without the owner's agreement.
The sensible sequence
Buy the bead uncapped. Have it tested — magnified examination and X-ray, with weight and dimensions on the report. Then cap it. The report describes the bead itself, the caps can be fitted knowing the bead is genuine, and the caps add nothing to the doubt.
If the bead comes capped, ask the seller for the uncapped report — a good seller tested before capping — and match the X-ray compartment count. If there is no such report, treat the bead as untested and consider whether the caps can be removed.
Caps as a warning sign
Not every capped bead hides something; capping is common and mostly innocent. But a high-mukhi or rare bead sold only capped, with the seller unwilling to supply it uncapped or to have the caps removed for examination, is a bead the seller does not want examined at the poles. Red flags when buying gemstones or Rudraksha online.
Frequently asked questions
Does capping damage a Rudraksha?
Properly fitted caps do not. Caps forced over the poles or glued with hard adhesive can crack the bead.
Can a capped bead be X-rayed?
Yes. The caps obscure the poles but the body is imaged and the compartments counted in most cases.
Can I have caps removed for testing?
A jeweller can usually remove pressed or glued caps without damage. Soldered mounts are harder. The laboratory examines the bead and the caps can be refitted.
Are gold caps a sign of a genuine bead?
No. Caps are a sign that someone paid for caps. The bead inside is the same whatever the metal.
Should a Gauri Shankar be capped?
Only after the twin has been X-rayed and the fusion confirmed natural. Caps on a joined pair complete the disguise.