A topaz
nickel
Calcium
You can scratch any mineral against a mineral with a higher place. Talc maybe?
It would have to be 5.0 because glass has a hardness of 5.5 and an iron nail has the hardness of 4.5
apatite with a steel knife feldspar with window glass
minearls
nickel
Calcium
quartz
not diamond
You can scratch any mineral against a mineral with a higher place. Talc maybe?
topaz
It would have to be 5.0 because glass has a hardness of 5.5 and an iron nail has the hardness of 4.5
apatite with a steel knife feldspar with window glass
It would have to be 5.0 because glass has a hardness of 5.5 and an iron nail has the hardness of 4.5
Between 3.5 and 5.5 on the Mohs scale of mineral hardness.
A mineral with a hardness of 6 on the Mohs scale can be scratched by anything harder than a 6, such as minerals with a hardness of 7 or higher. It will not be scratched by minerals with a hardness of 5 or lower.