Magnetite
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.
The mineral described is likely hematite. Hematite has a metallic luster, silver color, black streak, and contains iron. It is a common iron oxide mineral found worldwide.
azurite is one of the minerals that has a light blue streak.
Sulfur and gold are both yellow minerals. Topaz is a yellow gemstone, which I believe would also be considered a mineral. Pyrite, more commonly known as "fools' gold" is also yellow, and is technically an iron sulfide. Yup! SULFUR!
Magnetite crystals have a metallic lustre.
Magnetite can be black and it has a black streak. It is metallic and iron ore
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.
The mineral that fits the description provided is hematite. This mineral has a metallic luster, silver color, black streak, and contains iron. Hematite is commonly used as an iron ore and displays these characteristic properties.
The mineral described is likely hematite. Hematite has a metallic luster, silver color, black streak, and contains iron. It is a common iron oxide mineral found worldwide.
The mineral you are describing is magnetite. It possesses a metallic luster, a black streak, and is an important ore of iron. Magnetite is known for its magnetic properties and is commonly found in igneous and metamorphic rocks.
The mineral you are describing is likely magnetite. Magnetite is an iron oxide mineral with a metallic luster and a distinctive black color, often exhibiting a black streak. It is primarily composed of iron and is an important ore of iron, commonly used in steel production. Its magnetic properties also make it unique among other iron-containing minerals.
azurite is one of the minerals that has a light blue streak.
Sulfur and gold are both yellow minerals. Topaz is a yellow gemstone, which I believe would also be considered a mineral. Pyrite, more commonly known as "fools' gold" is also yellow, and is technically an iron sulfide. Yup! SULFUR!
The mineral you are referring to is likely magnetite. Magnetite is a black mineral with a nonmetallic luster, often appearing metallic or glassy. It is a common iron oxide mineral found in a variety of geological settings.
One mineral that has a non-metallic luster and is black is obsidian. Obsidian is a volcanic glass formed from rapidly cooled lava, and it typically exhibits a smooth, shiny surface. Its black color can be attributed to the presence of iron and magnesium in its composition. Unlike metallic minerals, obsidian does not have a metallic sheen, making it easily recognizable.
The color of a metallic streak is typically a dark gray or black color. This is because the streak left behind by a metallic mineral is the color of the powdered form of the mineral, which is often dark due to the presence of metal atoms.
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.