Definition of rock crystal in English:

rock crystal

Syllabification: rock crys·tal

noun

Transparent quartz, typically in the form of colorless hexagonal crystals.
More example sentences
  • Crystal gazing seeks visions allegedly seen in a ball of rock crystal, preferably quartz.
  • The rock crystal pieces were complemented by a positive kaleidoscope of coloured hardstones.
  • However in the pagan period, rock crystal was used to make crystals balls about 2 inches in diameter.

Definition of rock crystal in:

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Word of the day demoralize
Pronunciation: dɪˈmɒrəlʌɪz
verb
cause (someone) to lose confidence or hope