Sentiment is intellectualized emotion,emotion precipitated, as it were, in pretty crystals by the fancy. James Russell Lowell
Crystals grew inside rock like arithmetic flowers. They lengthened and spread, added plane to plane in an awed and perfect obedience to an absolute geometry that even stones - maybe only the stones - understood. Annie Dillard
I first met the subject of X-ray diffraction of crystals in the pages of the book W. H. Bragg wrote for school children in 1925, 'Concerning the Nature of Things.' Dorothy Hodgkin
... the proliferation of luminous fungi or iridescent crystals in deep caves where the torchlessly improvident hero needs to see is one of the most obvious intrusions of narrative causality into the physical universe. Terry Pratchett
For X-rays, the phenomenon of diffraction by crystals was a natural consequence of the idea that X-rays are waves analogous to light and differ from it only by having a smaller wavelength. Louis de Broglie
The interest of research workers has frequently been focused on the phenomenon of regularly shaped crystals suddenly forming from a liquid. Werner Heisenberg