white
Streak color is determined by scraping the mineral across a a streak plate, (which is made of unglazed porcelain), and then observing the color of the streak, which is left on the plate. Note that some minerals do not leave a streak, as they are too hard. Thus, it is important to learn other identification methods, to use in conjunction with streak color, in order to identify minerals.
silver or white
The term for this that I've always heard is "streak".
Pyrite's color is extremely similar to that of gold. However, the streak of pyrite is black. This can be used to distinguish it from gold.
Different minerals have different colors, actually.
the streak color is Dark Green
Perlite does not have a streak color because it is a volcanic glass that does not leave a streak on a streak plate.
Streak refers to the color of a mineral in powder form.
The streak color of calcite is white.
The streak color of calcite is white.
the color of the streak for dolomite is white
there is no name for the color, but there is the "streak" of a mineral, meaning the color of its streak.
purple
The color of a mineral's powder is its streak. This is the color of the powdered form of the mineral when it is scraped against a hard surface. Streak is a more reliable indicator of a mineral's identity than its exterior color.
Chert has no streak, it is too hard.
The streak color for wheat is white.
The color of the cobalt streak is blue