Magnetite
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.
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.
When a mineral is rubbed on a rough surface, it leaves a streak due to the color of the powdered mineral. The luster of a mineral refers to the way its surface reflects light, which can be metallic, glassy, pearly, dull, or oily in appearance.
When identifying minerals, having no streak is a property of hardness. A streak plate has a hardness of ~7(Moh's Scale). Thus any mineral having a hardness greater than 7 will have no streak.Metallic is the description of luster. Or the general appearance of a mineral surface in reflected light.If you were refering to the mineral having metal elements in it, streak is actually very useful for identifying them. Many minerals that are composed of non-metals have a white streak which can appear to be no streak, however there are also many minerals with no streak which are composed of non-metallic minerals (Diamond).
Magnetite can be black and it has a black streak. It is metallic and iron ore
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.
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.
Minerals can be identified by such as their color, streak, luster, and their hardness. What does streak, and luster mean?Streak-- Is the color of a mineral's powder for example: talc is a mineral and it is also powder and its streak is white.Luster-- Is the way a mineral reflects light from it's surface for example: glassy, pearly, silky, metallic and earthy can be words to describe luster.
Magnetite
When a mineral is rubbed on a rough surface, it leaves a streak due to the color of the powdered mineral. The luster of a mineral refers to the way its surface reflects light, which can be metallic, glassy, pearly, dull, or oily in appearance.
When identifying minerals, having no streak is a property of hardness. A streak plate has a hardness of ~7(Moh's Scale). Thus any mineral having a hardness greater than 7 will have no streak.Metallic is the description of luster. Or the general appearance of a mineral surface in reflected light.If you were refering to the mineral having metal elements in it, streak is actually very useful for identifying them. Many minerals that are composed of non-metals have a white streak which can appear to be no streak, however there are also many minerals with no streak which are composed of non-metallic minerals (Diamond).
Luster refers to how a mineral's surface reflects light - it can be metallic, glassy, pearly, or dull. Streak is the color of a mineral's powder when rubbed against an unglazed tile and can help identify the mineral even if its external color is different.
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.