crystal
n//ˈkɹɪstəl//kristall
(countable) A solid composed of an array of atoms or molecules possessing long-range order and arranged in a pattern which is periodic in three dimensions.
(countable) A piece of glimmering, shining mineral resembling ice or glass.
(uncountable) A fine type of glassware, or the material used to make it.
The glass over the dial of a watch case.