+Glass is an amorphous [solid](/wiki/solid) known for its transparency and hardness. Formed by rapidly cooling molten [material](/wiki/material), it appears frozen, yet lacks a crystalline structure. This versatile substance shapes our world, from windows to art.
+## See also
+- [Crystal](/wiki/crystal)
+- [Ceramic](/wiki/ceramic)
+- [Optics](/wiki/optics)
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