Sapphire crystal: Unterschied zwischen den Versionen
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'''Sapphire crystal''' | '''Sapphire crystal''' | ||
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Glass made of artificially produced sapphire. It is very hard (9 on the Mohs scale) and scratch-resistant. It ranks just below the diamond in these two respects. | Glass made of artificially produced sapphire. It is very hard (9 on the Mohs scale) and scratch-resistant. It ranks just below the diamond in these two respects. | ||