Crystal Glass

Lead glass

Lead glass, commonly called crystal, is a variety of glass in which lead replaces the calcium content of a typical potash glass. Lead glass typically contains 18–40% lead(II) oxide (PbO); modern lead crystal or leaded crystal contains a minimum of 24% PbO. Lead glass is desirable for a variety of uses because of its clarity. In marketing terms it is often called crystal glass.

Crystal

A crystal or crystalline solid is a solid material whose constituents are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions. In addition, macroscopic single crystals are usually identifiable by their geometrical shape, consisting of flat faces with specific, characteristic orientations. The scientific study of crystals and crystal formation is known as crystallography. The process of crystal formation via mechanisms of crystal growth is called crystallization or solidification.

Glass

Glass is an amorphous (non-crystalline) solid. Because it is often transparent and chemically inert, glass has found widespread practical, technological, and decorative use in window panes, tableware, and optics. Some common objects made of glass are named after the material, e.g., a "glass" for drinking, "glasses" for vision correction, and a "magnifying glass".

crystal

Noun

1. 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.
2. A piece of glimmering, shining mineral resembling ice or glass.

Adjective

1. Made of crystal.
2. Very clear; coherent.

glass

Noun

1. An amorphous solid, often transparent substance, usually made by melting silica sand with various additives (for most purposes, a mixture of soda, potash and lime is added).
2. Any amorphous solid (one without a regular crystal lattice).

Verb

1. To fit with glass; to glaze.
2. To enclose in glass.