| 11. | Instead of polymers, Hunt's device relies on a tiny quartz crystal.
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| 12. | At the centre on the front, there is a large, oval quartz crystal.
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| 13. | Using quartz crystals the shoe generates electrical current as the wearer walks around.
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| 14. | Meacham's circuit included a quartz crystal oscillator and a lamp in a Wheatstone bridge.
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| 15. | A local rock shop just obtained some quartz crystals which phosporesce ( and floresce.
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| 16. | A number of firms started producing quartz crystals for electronic use during this time.
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| 17. | Oxalic acid is also used to clean iron and manganese deposits from quartz crystals.
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| 18. | In the 1960s the electronic battery and kept time with a vibrating quartz crystal.
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| 19. | The Indian Memorial Museum houses pre-historic Indian pottery, fossils, Quartz crystal and antique glass.
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| 20. | Two types of quartz crystals exist : left-handed and right-handed.
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