Anyone Using Crystals?

I have been experimenting with tourmaline and some of the ideas mentioned in this thread.  I have heard some very good results, so thanks for all the ideas Geoff and @mahgister and others.  One thing I didn't see above (but I could have missed something as there are many good ideas embedded above) is that it is quite effective to close off open USB and ethernet ports on modems/computers etc with crumbled tourmaline powder pressed onto bits of silicon caulking material.  I emptied tourmaline powder into convenient crevices in my main Verizon modem and also put a piece of tourmaline inside my Apple Airport Express which serves as router.  All of these tricks have been quite effective in improving my computer audio sound quality. I'll also be trying out some of the other stones/crystals mentioned here in time.

I used black tourmaline that I bought on eBay from the seller worldincensestore. He has both glossy black tourmaline rods and rough black rocks. I have both but can’t tell the difference sound wise anyway. Bits of the rough black rocks are easier to crumble, and you might find some small amount of powder in your shipment due to impact in transit.

I am finding the biggest impact of using black tourmaline around the fuse box. The effect is on naturalness and coherence overall, and bass and mid-range. I was surprised by the sharply different effect I got from a piece of red agate in treble output around the fuse box, and am now very happy with a combo of the tourmaline and agate there. And then I have tourmaline rocks now sitting on most of my AC cable ends and in total they have a nice impact. As noted above by others placement does seem to matter. I want to try the tourmaline inside my balanced power transformer conditioners next, maybe next weekend.

I have only been using the powdered black tourmaline in computer and modem USB and ethernet jacks which tend to get a bit warm from the heat hose units generate, so perhaps that is why I am finding it somewhat helpful there.  I have not found tourmaline helpful around audio RCA jacks or audio interconnects.  I do use Cardas caps for open RCA jacks.  Also black tourmaline was somewhat helpful on my AC connectors which may get a little warm.  I also have some tourmaline inside my tubed DAC placed near the rectifier tube which presumably is hot enough to generate a decent benefit which I heard.  I haven't heard anything special from placing them near my integrated amp's exposed tubes yet, but I will try that again sometime.  Definitely got a small advantage inside my small BPT conditioner which is used for computer audio devices with SMPS.  

A very pleasant surprise was the increase in cleanliness overall from a red fire agate stone near my fuse box.  Odd thing is that tourmaline seems to be good around the fuses themselves but definitely not on the other side of the same box which is accessible from my cabinet and is encased in plastic and inside a steel box.  On that other side the agate seems to be very helpful. 

Geoff, at some point I would like to try out your pebbles for RCAs.  

@geoffkait, @lak or anyone else who might know the answer to this safe operation type of question please. I have a piece of unshielded tourmaline sitting inside my DAC on the PCB right on top of what is a live conductor strip that is connected to what I believe is the voltage regulator of the DAC. So I guess this is not the DAC PCB. I have the tourmaline held down on the PCB on its edges with some blu-tack. The tourmaline piece actually straddles a couple of potentially live conducting metal strips. Do you think this is unsafe or could potentially damage my DAC? I did this because I believe that tourmaline is essentially non-conductive. And more importantly I believe that electricity (just as heat too) causes it to discharge ions in the way that is helpful. What I can definitively say is that the effect on my DAC’s sound quality is very nice indeed. Well worth my while leaving this way so long as it is safe. Your help/ideas as to safety etc. much appreciated. Thanks.

OK thank you Elizabeth.  I will do that.

Thanks for the advice @elizabeth and @geoffkait.  I took the tourmaline off all live connections just to be safe.  But I am using a lot of it now - several pounds weight - all over inside my BPT conditioners, on most power cable connectors, inside my DAC and in computer audio components as well as all around all my amp tubes.  There is a very meaningful improvement of rich, natural glow in the sound I am now getting, and also better definition in all frequencies.  Very worthwhile. 

Red fire agate stones much better than anything else around my fuse box.

I will be interested in trying some of your crystals soon Geoff. Will be in touch soon.