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Glass made of artificially produced [[Saphir|sapphire]]. It is very hard (9 on the Mohs scale) and scratch-resistant. It ranks just below the diamond in these two respects. Better watches often have a sapphire crystal which is highly resistant to scratching or shattering. | Glass made of artificially produced [[Saphir|sapphire]]. It is very hard (9 on the Mohs scale) and scratch-resistant. It ranks just below the diamond in these two respects. Better watches often have a sapphire crystal which is highly resistant to scratching or shattering. | ||
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Version vom 4. Februar 2009, 02:11 Uhr
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. Better watches often have a sapphire crystal which is highly resistant to scratching or shattering.