BTW you can buy 2, 15mm Ferrite Cores for $25.00 on Amazon.
@daledeee1 the thread is bout stones not $39.00 springs on Amazon. I am a firm believer in Vibration Control and that is well documented and science supports that in audio, electrical and mechanical power transmission. Vibration and it's the parasitic energy/drag effect efficiencies.
I have Springs or Suspension under all my equipment and have brass pucks on top of my equipment to help reduce vibrations.
Hunks of rock with crystals not so much. Kind of like drinking tigers blood or snorting Rino Horn will make a hard man.
So keep it in context you are comparing real engineering and science with VOODOO.
Do you guys wear power crystals around your neck to give you strength?
Reminds me of the Eastern European (no rub on Eastern Europe or the wonderful people) that sold copper bracelets on the streets of Cicero IL down by the Danly Machine Factory claiming they cured arthritis (debunked by the medical field for centuries).
Apples for apples and keep it real.