And before the throne there was a sea of glass like unto crystal: and in the midst of the throne, and round about the throne, were four beasts full of eyes before and behind.

-Bible (NewTestament)
Revelation 4:6^7.

   Yevtushenko has†an ego that can crack crystal at a distance of 20 feet.

-Cheever,JohnWilliam
Recalled on Cheever's death,18  Jun1982.

In sculpture, did ever anybody call the Apollo a fancy piece? Or say of the Laocoo«  n how it might be made different? A masterpiece of art has in the mind a fixed place in the chain of being, as much as a plant or a crystal.

-Emerson, RalphWaldo
the 1841  'Thoughts on  Art', in The Dial, vol.1, no.3,  Jan.

   I hold my lady's head like a crystal and ossify myself by gazing: I am screes on her escarpments, a chalk giant carved upon her downs. Soon my hands, on the sunken fosse of her spine move towards the passes.

-Heaney, SeamusJustin
  North,'Bone Dreams', no.4.

Crystal sincerity hath found no shelter but in a fool's cap.

-Gerard Manley Hopkins
  'Floris in Italy'. Collected in H House and G Storey (eds) The Journals and Papers of Gerard Manley Hopkins (1959), p.42.