Sapphire crystal

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Version vom 23. Dezember 2008, 00:24 Uhr von 87.157.229.168 (Diskussion) (Die Seite wurde neu angelegt: Sapphire crystal 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 ...)
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Sapphire crystal


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.

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