Shaping processes in crystal growth
Shaping processes in crystal growth are a collection of techniques for growing bulk crystals of a defined shape from a melt, usually by constraining the shape of the liquid meniscus by means of a mechanical shaper. Crystals are commonly grown as fibers, solid cylinders, hollow cylinders (or tubes), and sheets (or plates).
Source: Wikipedia — Shaping processes in crystal growth (CC BY-SA 4.0)