Are Shakti Stones effective?


I have never used Shakti Stones and wonder if they really work and, if so, what do they do,  I have used the Shakti Holographs and found them to magically focus the sound and tighten the soundstage. From what I have heard, even from Shakti, is that the stones make a significant difference is some usage and less in other. Has anyone used these and what do they do?
mglik
Thanks denverfred....

I just want to remind the readers that what i call "Golden Plate", a device i created is a plate of shungite+copper tape on the external side .... It is more efficient this way, only shungite is less powerful, and i put these "golden plates" all along the electrical grid of the house, behind speakers connectors, on router, on the electrical panels, power supply, etc....(dont use on amplifier or dac because they will compress the sound ) For interconnect or for my Schumann generators grid i use very small "Golden Plate" namely very small shungite plate+ copper tape on the external side of the application.....

It is my main device to lower the noise on the electrical grid of the house....(electrical embeddings of an audio system is very important)
 
Golden plate cost: peanuts...  I dont sell anything.....Grab it....

:)

My best to you and to all....
They have a patent you can check out that has a diagram of the internals and describes their construction and how they are supposed to work. The stone part is just a shell for the actual internal working components, I don't know what its' purpose is or why they settled on the stone aspect of the shell.
I'm open to try any tweak if the price is right and the resale value is decent in case it does nothing of note. I bought a Shakti Stone, tried it in different spots in different setups both audio and video, it really made a big difference placed on an Extron rgbhv distribution amplifier I use with broadcast monitors. I haven't moved it since to other spots after changing things round and it's been years since I tested things out so I can only say I noticed a real change in this one spot. Find a dealer that may have a demo period if one wishes to try them out for themselves.
I had them for years, used them in different systems and NEVER noticed any difference when they were applied on different components of each setup. I finally sold them a few months ago. 
These stones work best on a Cd player that uses only green magic marker on the edges of the CD's.  However, they are good for throwing at Barry Manalow CD's and LP's.