What is the Difference Between Crystal and Glass?
A crystal is a solid lattice of atoms. Glass, on the other hand, is an amorphous solid (usually of silicate). Cannibalizing from Wikipedia (never a good idea — use the linked sources!), we learn that a glass is defined as: “In the technical sense, glass is an inorganic product of fusion which has been cooled to a rigid condition without crystallizing.” They appear similar and have many similar properties, but do not be fooled — they are different forms of matter. Cool, huh?