The most commonly known mineral that can be scratched by a fingernail is talc.
Magnatite is the mineral that has a nonmatallic luster, is black, and can be scratched by a fingernail.
The most commonly known mineral that can be scratched with a fingernail is talc.
The mineral that fits this description is graphite. Graphite is very soft and can be easily scratched by a fingernail. It has a metallic luster and a black streak.
Talc (1 on the Mohs Hardness Scale) can be scratched by a fingernail.
Rocks that mostly contain minerals like mica, gypsum, and talc can be scratched by a fingernail.
Magnatite is the mineral that has a nonmatallic luster, is black, and can be scratched by a fingernail.
The mineral that has a similar hardness to a fingernail is gypsum. Gypsum has a Mohs hardness of 2, which makes it soft enough to be scratched by a fingernail.
The most commonly known mineral that can be scratched with a fingernail is talc.
The mineral that fits this description is graphite. Graphite is very soft and can be easily scratched by a fingernail. It has a metallic luster and a black streak.
Hornblende is a mineral with a hardness of about 5 to 6 on the Mohs scale, which means it is harder than a fingernail, which has a hardness of about 2.5 to 3. Therefore, hornblende cannot be scratched by a fingernail. Instead, a fingernail would likely be scratched by hornblende if they came into contact.
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.
Talc (1 on the Mohs Hardness Scale) can be scratched by a fingernail.
Rocks that mostly contain minerals like mica, gypsum, and talc can be scratched by a fingernail.
Marginally. Halite has a hardness of 2 to 2.5, about the same as a fingernail.
That could be graphite, which is a natural allotrope of the element carbon.
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.
azurite is one of the minerals that has a light blue streak.