a solid formed by the solidification of a chemical and having a highly regular atomic structure
a crystalline element used as a component in various electronic devices
a rock formed by the solidification of a substance; has regularly repeating internal structure; external plane faces
[ Syn: crystallization ]
colorless glass made of almost pure silica
[ Syn: quartz glass , quartz , vitreous silica , lechatelierite ]
glassware made of quartz
a protective cover that protects the face of a watch
[ Syn: watch crystal , watch glass ]