Mantras, Gemstones and Rudrakshas work. Most of the people are not able to get benefit from these. The reasons are as follows:
The same thing can be said about Rudrakshas.
HYBRIDISED rudrakshas are in the market on high prices/low prices. These rudrakshas are not effective. Rudrakshas from Nepal origin are to be considered best. Higher face Rudrakshas are 99% fake. Rudrakshas are generally cleaned with acid . This exposure is not good for rudrakshas .Chemically cleaned rudrakshas loss spiritual power.
If we want to chant MANTRAS for benefit then it is very effective and at the same time it is very-very hard to get benefits. Its a super-science. So, each and everyone can not be benefited unless the proper procedure is followed .It has a lot of rules and regulations. The seed mantras are easy for getting benefits than other mantras (i.e. they can be keelit). Everything can be learnt gradually by His wish. Its a time taking process.The energy emitted through all these things can be mapped by scientific equipment.