Some crystals are very regular. https://en.wikipedia.org/wiki/Crystal#/media/File:Ho-Mg-ZnQuasicrystal.jpg https://en.wikipedia.org/wiki/Crystal#/media/File:Ho

Some crystals are very regular. https://en.wikipedia.org/wiki/Crystal#/media/File:Ho-Mg-ZnQuasicrystal.jpg https://en.wikipedia.org/wiki/Crystal#/media/File:Ho-Mg-ZnQu...