@datum I read about this in the '80s, in a book of dubious scientific value (IIRC it listed other mystical properties of crystals/pyramids, contained cryptids, UFOs etc.), and discussed it with a friend. We tentatively concluded it was bit too difficult to believe, but it was borderline… Anyway very interesting to learn more about it, and multiple examples of it. (Edit: Wondering if the book may have referred to Rupert Sheldrake and Morphic Resonance? IIRC the book was basically saying that once the universe has learned how to form a certain crystal anywhere, the entire universe knows. I'm not going to touch that, but I'm a lot happier with airborne seeding of micro-crystals. 🥵)