Rock crystal quartz and quartz watches

Quartz has had a significant impact on the watch industry since the introduction of quartz watches in the 1960s. In quartz watches, a quartz crystal is used as an oscillator to maintain accurate time.

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Gypsite

Gypsite is a mineral composed of calcium sulfate dihydrate, it is a very common mineral and is used in the manufacture of plaster and other construction products.

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