"She was like one of those strange crystals that one sees in museums, which are at one moment clear, and at another clouded."
~ The Sphinx Without a Secret
by Oscar Wilde
And through the dewy meadow's breast, fringed with shade, but touched on one side with the sun-smile, ran the crystal water, curving in its brightness like diverted hope.
~ Lorna Doone
by R. D. Blackmore
"You are always training yourself to be, mind and body, as clear as crystal, and you always are, and never change; whereas I am a muddy, solitary, moping weed."
~ The Mystery of Edwin Drood
by Charles Dickens