Crystal
A crystal or crystalline solid is a solid material whose constituent atoms, molecules, or ions are arranged in an ordered pattern extending in all three spatial dimensions. In addition to their microscopic structure, large crystals are usually identifiable by their macroscopic geometrical shape, consisting of flat faces with specific, characteristic orientations.
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Famous quotes containing the word crystal:
“We have ... a thirst unquenchable, to allay which he has not shown us the crystal springs. This thirst belongs to the immortality of Man.... It is no mere appreciation of the Beauty before us—but a wild effort to reach the Beauty above.”
—Edgar Allan Poe (1809–1849)
“Comets, importing change of times and states,
Brandish your crystal tresses in the sky.”
—William Shakespeare (1564–1616)
“Wynken, Blynken, and Nod one night
Sailed off in a wooden shoe—
Sailed on a river of crystal light,
Into a sea of dew.”
—Eugene Field (1850–1895)