Yes. It is much harder than your fingernail.
The Mohs hardness of serpentine is 2,5-3; it a soft mineral. Not scrached by a graphite pen; scratched by fingernail, copper etc.
Graphite is the main ore of pencil lead.
No. Graphite is pure carbon.
If it's not graphite, you can't write.
yes graphite can be scrathced by a nail
fingernail
Yes!!! The allotrope ' yellow flowers of sulphur' is quite soft and can be scratched with a finger nail.
yes it can be scratched by certain things
Yes.
Yes
yes itt can
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
quartz
It can be scratched by a diamond, corundum, topaz, and quartz.
go seek medical advise
Yes. A steel nail has a Mohs hardness greater than that of fluorite.