Yes most certainly, but probably not the best thing to scratch with your nails.
fingernail
Magnatite is the mineral that has a nonmatallic luster, is black, and can be scratched by a fingernail.
Marginally. Halite has a hardness of 2 to 2.5, about the same as a fingernail.
Calcium
Talc i assigned a hardness of 1 according to the Mohs scale of hardness. This implies that talc has the least hardness and therefore is soft and can be scratched by a fingernail.
talc, gypsum
bob fred and bobby
No, emerald is a very hard substance.
yes graphite can be scrathced by a nail
Rocks that mostly contain minerals like mica, gypsum, and talc can be scratched by a fingernail.
Talc (1 on the Mohs Hardness Scale) can be scratched by a fingernail.
Well you see, it's pretty simple. If a fingernail has a hardness of 2.5, and the question is asking what mineral can easily be scratched by a fingernail. Well then it is Graphite. It has a less hardness than your fingernails.