The 3 more potent stones I know are in order : Shungite( may damage sound if too much near some gear but act more on the environment of the sound), Herkimer (enhancer and clarifier of sound), Tourmaline (clarity of sound)...They are useful in audio, and without them really my actual system does not please me...
Some other stones are interesting and I use them...varieties of Quartz, pink, lemurian etc they all have their particularities...Audible...
Agathe of Madagascar and amethyst are good also but way less potent act more on timbre …. I like the effect of Kambaba Jasper, this kind of stone had an effect very special on the imaging of the sound in space... Jade or his cousin nephrite also but more tenderly...I love nephrite...
Some other stones are interesting and I use them...varieties of Quartz, pink, lemurian etc they all have their particularities...Audible...
Agathe of Madagascar and amethyst are good also but way less potent act more on timbre …. I like the effect of Kambaba Jasper, this kind of stone had an effect very special on the imaging of the sound in space... Jade or his cousin nephrite also but more tenderly...I love nephrite...