But any minerals , any of them affect the S.Q.
mahgister, I have been using crystals in my listening rooms for over two decades now, and do not discuss it as it seems too fringe for most. Your research has paralleled mine in that I have found the results can often be negative. It took me years to find some sort of repeatable pattern in their usage. The impacts can be quite profound when applied intelligently.
I believe the mechanism at play is the one under discussion at present.