silver or white
The streak is colourless.
white
amethyst
Different minerals have different colors, actually.
The term for this that I've always heard is "streak".
Hardness and streak color are very important. The color of the mineral helps some, as well.
Color, streak color, hardness, cleavage, and chemical.
A streak plate, or unglazed white porcelain tile, is used to perform streak tests which can help to identify minerals. Rubbing the mineral on the streak plate will finely powder it and reveal the color of the powder, which in some cases is quite different from the color of the mineral. Eg: hematite is black but has a red streak - a good way to tell you have hematite instead of one of the many other shiny black minerals.
black/silver
It's called the minerals streak
Magnetite.Has metallic luster, silver color, black streak, and contains (Fe) Iron.
The streak of the mineral is the mineral's powder color
Color is the observable color of a mineral specimen in natural light. Streak is the color of a mineral when powdered. The color of a specific mineral specimen may be different than its streak color. Because many impurities can alter the color of a mineral, but not the streak, streak is a more accurate predictor in mineral identification.
The color of a mineral in powdered form is called the mineral's Streak
Nickel leaves a silver-gray streak. Note that nickel is an element.
Streak is the color of a crushed mineral's powder. The color of a mineral's powder may differ from the actual color of the mineral. This property can be useful for mineral identification.Almost every mineral has an inherent streak color, no matter what color the actual mineral is.
there is no name for the color, but there is the "streak" of a mineral, meaning the color of its streak.
The streak color will vary depending on the type of pyroxene mineral.
The color of the powdered form of a mineral is called
Hematite can appear gray in color, but will exhibit a reddish to rust-colored streak.