Under my amplifier the "golden" pyramid, upside down because the shungite side must face the gear belly, all copper tape covered except for the basis, where I glued some Herkimer diamond cable connected to my other stones, gives me an improved layerings of sound, evident after few minute listenings and more so after few hours... I put some photos in my "virtual systems" audiogon thread...
I had the same audible dividend, less spectacularly evident, with another "golden" pyramid placed the shungite basis on the power cord of my Panamax surge protector and power conditioner....
By the way, plate or pyramid, or cubical shungite, the geometrical form is without importance for the audio effect...Only the placement orientation of the shungite face, and the location of the "golden" shungite , mainly, on the breaker electrical panel, on my router-modem, on interconnectors or mains cable, on top or under my S.G. on power conditioner, on unused duplex wall plugs, and perhaps the windows( that I must try)...
Merry Christmas to you all , I wish to you celestial music experiences, awaked or in dreams...