Do ceramic rings scratch?

Related questions

1. Is ceramic harder than glass?
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3. Is Diamond A ceramic?
4. How strong is zirconium?
5. Is zirconia a ceramic?
6. Are zirconia crowns the best?
7. Can crowns fall off?
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9. Why do ceramics break easily?
10. Is ceramic crown better than porcelain?

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2. #tungsten
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5. #resistant
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7. #being
8. #scale
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16. #black