Sapphire crystal
Version vom 12. März 2009, 01:18 Uhr von Torsten (Diskussion | Beiträge)
Sapphire crystal
| other languages: de nl ru |
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.