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Thursday, June 28, 2007
Quartz Crystals
(via National Geographic Magazine) Quartz Crystals vibrate when electricity is applied. Thin plates of the mineral, vibrating at precise rates, keep radio transmitters on proper frequencies. Such crystals, tuned to different frequencies, separate simultaneous calls on the same telephone channel. Twisting or squeezing quartz produces an electric current.
Labels:
gemstones,
synthetic gems
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