In a 2026 Interview with Trevor Grassi and Veda Austin (1) Dan Willis described how Marcel Vogel once performed an experiment in Northern California with wine. By letting rather bad wine flow past a crystal, the quality of the wine would have improved to such a degree that it turned into an award wine, as Dan says.
In the excerpt below Dan describes the details (click on the image):

SOME REFLECTIONS
How would it be possible that merely the presence of a crystal would actually improve the wine’s quality to a great extent? Could this work for other things that we eat or drink? If you would like to reflect on these crystal questions, be sure to join our study group on Telegram (2).
You can learn more on the wine experiments at (3).
FOOTNOTES
(1) Lost science of WATER & CRYSTAL: Inter-dimensional Bridges to SOURCE, With Dan Willis & Veda Austin
(2) The Crystal Consciousness Research Study Group
(3) The Finishing of Wine with Crystal Technology


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