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:
“Madame, ye been alle beautee shrine
As fer as cercled is the mapemounde:
For as the crystal glorious ye shine,
And like ruby been youre cheekes rounde.”
—Geoffrey Chaucer (1340?–1400)
“I’m headed for a land that’s far away
Beside the crystal fountains.
So come with me, we’ll go and see
The Big Rock Candy Mountains.”
—Unknown. The Big Rock Candy Mountains (l. 5–8)
“Shall we gather at the river,
Where bright angel feet have trod;
With its crystal tide for ever,
Flowing by the throne of God?”
—Robert Lowry (1826–1899)