Dimond
Diamond.
All minerals can be scratched if you used the right scratcher. Diamond can only be scratched by another diamond, and is most resistant to being scratched. In the jewelry world any thing harder than a 7 on the Mohs hardness scale is consider resistant to scratching.
Quartz
hardness
The quartz in granite is the most resistant component to weathering.
hardness
All minerals can be scratched if you used the right scratcher. Diamond can only be scratched by another diamond, and is most resistant to being scratched. In the jewelry world any thing harder than a 7 on the Mohs hardness scale is consider resistant to scratching.
Quartz
This is diamond.
hardness
hardness
hardness
Hardness
hardness
hardness
hardness
hardness.
flouride