. . . . "Crystals of a single substance often take very different forms, all equally clean and precise: calcium carbonate appears as a rhombohedron, a hexagonal prism, a scalenohedron and a pentagonal dodecahedron; pyrite as cubes, octahedra, pentagonal dodecahedra and icosahedra." . "empirical-generalization" . . "One substance takes many crystal forms, all equally sharp" . "Haüy RJ, “Traité de minéralogie, tome premier”, Conseil des Mines, Paris (Chez Louis) (1801); Discours préliminaire, p. 10. Scope: Mineral species; habit diversity." . "Haüy RJ. Traité de minéralogie, tome premier. Conseil des Mines, Paris (Chez Louis) (1801)" . "René Just Haüy" . "1801"^^ . "Volume 1 holds the general theory of crystal structure: integrant molecules, the primitive form, and the laws of decrement first published in the 1784 Essai. The 1784 Essai (archive.org bub_gb_HbJDAAAAcAAJ) was fetched but its eighteenth-century OCR (long s) is too corrupt to quote; see SEARCHES.md. French." . "Public domain (1801)." . "Traité de minéralogie, tome premier" . . . . "Reading copy of Traité de minéralogie, tome premier" . . . "delphisci crystals-and-form claim extractor" . . . . "Claude Fable 5.1" . . . . . . . . . . . . "Page 10 of the reading copy; paragraph 264 of the normalised text 1801-hauy.txt (sha256 75e8725eafc33d75d3da5d556fa40bdfeaf55bd1fcb6fddfa8cdb23a59082d19), produced by build/fetch.py and checked by build/check-quotes.mjs. The text itself is not committed." . . . "Souvent les cristaux originaires d'une même substance prennent des formes très-différentes, toutes é^a- Jement nettes et exécutées avec une égale précision." . . "75e8725eafc33d75d3da5d556fa40bdfeaf55bd1fcb6fddfa8cdb23a59082d19" . "Checksum of the normalised one-paragraph-per-line text derived from the reading copy, not of the reading copy itself." . "crystals-and-form" . "2026-11-07T03:18:23.997Z"^^ . . . . . "René Just Haüy 1801 claim: One substance takes many crystal forms, all equally sharp" . . "RSA" . "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAyFHtPB6p0mCjDozxlOY9CmO3nBm7Te3jFbXyLmM+G1tGe47Da0jYIbhkl9Oo1ZjxmCa3LCwlEqK8gj6hEIcL4ahW30JXh9HycfKVk1bugkzMEV15tJdTzAU3sGMFnbNsn43xY2LFLy45tApkRm5byEiM7oRRrooIdwoQKnP4Wzq/bfAoJ9qvW+MGkelyOTd1jbSt+KfmT7xKmDfWzAHddUlWwMX2QJOLxDaffOteTop6ZRgPiNmPJKA/S62Gac9XtSYT3oDkZ6/nr5cxxNLpOyxTf5FPISiCe11xYO/unYjY+mwnOfA8yhJIyx1l0O9I0vpOpn+E5TvyHJV+oSTrvwIDAQAB" . "ii/6+bFLY2B1kUua1SKjpm8Wu18UVGVVjEAPXTTwHte42wpO4FmwWGTk35AJQmqzfSB3qgR5XhG0MnLiPIYMCJNle4hFVVLKsQ2XFL4MRKnM83E1Gl2ucC7nNV0sUrYGzmv2eBfb/bbkXABH5thlKdNZC5QOsWTvhMH8AmOLUr/alGakNu1YMyR68AvB5urv6x3v+2sJP06u7foaYz8cEn0pDvOEyUFpEZzAmvH8MVfjtMuZFWp+OvSqb4XYzJg6JQ6OSPJogsVP+6nc8OmSxZqVXxcxdz6HzPJrSdqn2wetdnCh54LskoiqOJemdHtnpX/Ssj6eRS8GVdOv/Ph2Kg==" . . .