@tksteingraber Yeah, it's going to be fun. But only Graphene is expensive hence very small quantity, rest all are quite cheap. Tourmaline costed less than USD 8 for 1 kg, so did others...so it's not at all expensive for me.
@tksteingraber I would suggest you to connect your ground box to earth of your wall socket and leave it as it is for a day or atleast 4-5 hrs. I am not sure how these works but if it is collecting ground noise in the material mix, it is essentially accumulating the charge which it can not drain as it is as there is no other connection for it to discharge it to. Think of it as variation of a capacitor. Capcitors can only hold a certain amount of charge and they will need to be discharged through a path.
I am building my ground box using mainly quartz chips (both transperant and pink in equal quantity), black tourmaline chips (double thbe quantity of quartz), little Shungite, Pyrite, Blue Apatite, Malachite, Magnetite Powder (Iron oxide), Graphite powder & Little Graphene powder for seasoning :)..I am excited to see how this mixture turns out and how does it affect the sound in my setup.