In the sand box

I'd avoid quicksand at any cost.  A few years ago my DAC was swallowed whole, never to be seen again.  Tragically, this incident occurred in clear view of my grandkids.  Counseling can get very expensive.

Grand sand animates the playing of the grand for less than a grand paid by an aging grand.

I like placebo sand mixed with some psychoacoustic pebbles.   Then a pure white quartz crystal directly over the amp's transformer.

I also have a shaman come in and perform some cool looking stuff that aligns the polarity of the electrons.  

Sure, why not.

I’ve put sand in speaker stands for the same reason, to dampen vibration.

Being a professional woodworker I have designed and built audio racks using custom  designed sand filled isolated shelves. Since silica sand is getting hard to find I like to use a quartz based media blasting sand very similar to the article listed by soma70.  Mineral based sand has all the same properties as silca sand, clean, dry, and uniform grit size.  If you want to eliminate as much vibration as possible its important to have several layers of dampening and let your sand filled isolation shelves float . As we know, when you isolate your components from vibration with a quality rack it helps squeeze the maximum performance from your system components.  One of the benefits of vibration isolation dampening is a very black almost spooky background.

Paul