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The streak test is really only useful in mineral identification, not for combinations of them as with pumice.
In mineralogy, streak is the powder from a mineral when you rub it against a light colored hard surface. Streak is used to identify some minerals.
I'm honestly not sure what your instructor expects there. The name of that procedure is the "streak test", but that doesn't quite fit in the sentence.
Rub it against something warm, generate heat to get back the circulation.
The force that causes rocks to break as plates rub past each other is called shear stress. This stress leads to the formation of faults and the subsequent release of energy in the form of earthquakes.
streak
When you rub a mineral on a tile it is called streaking a mineral. The line that is left is called the streak, and the tile itself is called a streaking plate.
To obtain a minerals streak you would get a piece of the mineral and rub it against something that is strong enough to erode a little of it.
The mineral with hardness 3 will get scratched.
Rub a finger over the mineral
I can help you! So first determine whether the mineral is light or dark. If it is light' you can use a chalkboard slate or even another darker mineral. You rub the mineral on the other solid and see if it leaves a mark If it is dark you simply do the same rubbing but use a light mineral. :)
The test described is called a streak test, and indicates the true color of a mineral as observed in a powdered form.
The test is called a streak test and it leaves a powdered form of the mineral on the porcelain. The powdered mineral reveals the true color, of the mineral specimen, which may or may not match the color of the specimen.
it is determined when you rub the mineral on a hard, rough, white surface.
It means the color of a minerals powder. When you rub a mineral against a piece of unglazed porcelain tile, the minerals powder is left behind, although the powder's color may seem a little bit lighter than the mineral's color..............
By rubbing mineral against a piece of porcelain tile, the objective of the test is to observe the hardness of the mineral.
That procedure tests the streak of the mineral. Oddly, the streak color of some minerals are different from the mineral's color.