Its the coherence aspect that I find interesting because the main difference seems to be intent and its shape . If you can put the quartz in water and its emitting uv range biophotons that's something that can be picked up a photomultiplier. So it would be interesting to see the difference between this and a 'conventional' piece of quartz. It does also slightly make me wonder the point of grinding quartz in a biodynamic preparation if presumably it could sit in the water and possibly achieve a similar result.
As an aside there are also other people saying similar things with regard to wine etc with bio ceramic materials. These are microbe fermented clay fired at high temps that are meant to emit near infrared and then you have biochar quenched with microbes during firing that are meant to do a similar thing. When you think about basalt it is formed in a volcano at high temps and slowly cool in the core of the volcano and is in constant contact with the earth and quartz crystals form with heat again under similar but different circumstances and the slower they cool the larger the crystal. So if you get things really hot the theme is you can imprint something on the material. Even metallurgy is much the same thing isn't it? Polycrystalline material we imprint with other materials and anneal and quench to dictate its eventual crystal size and properties.