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:
- The British & World English dictionary