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quartz
Definitions
[kwɔːts], (Noun)
Definitions:
- a hard mineral consisting of silica, found widely in igneous and metamorphic rocks and typically occurring as colourless or white hexagonal prisms. It is often coloured by impurities (as in amethyst, citrine, and cairngorm).
Phrases:
Origin
:
mid 18th century: from German Quarz, from Polish dialect kwardy, corresponding to Czech tvrdý ‘hard’
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definition by Oxford Dictionaries
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