One of the mysteries of the English language finally explained.
Transparent quartz, typically in the form of colorless hexagonal crystals.
- ‘A number of mysterious indications from ancient cultures link the use of rock crystals with communications through the air.’
- ‘Crystal gazing seeks visions allegedly seen in a ball of rock crystal, preferably quartz.’
- ‘In 1986 the world's leading science journal announced that the most ancient rock crystals on earth, according to isotope dating methods, are 4.3 billion years old.’
- ‘Perhaps it was his ambition to have a career commensurate with his talent that led him to settle in Paris, where he distinguished himself over several decades by his cutting of rock crystal, his speciality.’
- ‘However in the pagan period, rock crystal was used to make crystals balls about 2 inches in diameter.’
- ‘A volcanic eruption, or magma rising and cooling close to the Earth's surface, will cause the formation of a wide variety of igneous rock crystals.’
- ‘Painting on the inside of snuff bottles made of rock crystal or glass was a great Qing innovation.’
- ‘By a happy chance, the earliest postclassical European rock crystal vessels are at the same time the purest in terms of design.’
- ‘The few glass beads, and one of rock crystal, are also imports.’
- ‘If left to their own devices, pieces made of rock crystal will last forever, but they are of course unusually vulnerable to breakage and destruction.’
- ‘A clear and colorless glass, called cristallo in Italian for its resemblance to rock crystal, was a widely sought Venetian product.’
- ‘The same people crafted stone tools of a satisfying symmetry that seemed to transcend mere utility, and to collect as objets trouvés, rock crystals, fossils and pebbles of pleasing shapes.’
- ‘Small flakes of rock crystal as well as axes, bone projectile points, and burials are known.’
- ‘Qianlong, who reigned from 1736 to 1795 and died in 1799, was one of the greatest patrons and collectors of Chinese rock crystal carvings ever.’
- ‘The rock crystal pieces were complemented by a positive kaleidoscope of coloured hardstones.’
- ‘Also of interest were objects of precious or semiprecious materials such as rock crystal - or natural wonders - such as nautilus shells.’
- ‘Prague once again became a great centre of hardstone - not to mention rock crystal - production in the later sixteenth century by virtue of the patronage of Emperor Rudolph II.’
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