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.
It is called a mineral streak.
It depends on the miniral you are scratching
streak
The mineral is sratched on a unglazed white title the powder left is the is the color of the minerals streak which is used to find the name of the mineral and identify it.
In Geology, the 'streak test' is used to identify a mineral by either grinding it to a powder, or scraping across a rough surface to study the streak left behind. It also tests a mineral's hardness.
what is the color of the powder called that a mineral leaves when scratched across a special plate
Which mineral leaves a green-black powder when rubbed against an unglazed porcelain plate?
its just a type of ash
It is called the streak, and refers to the color of the powdered mineral that is left on a ceramic streak plate after the mineral specimen has been drawn across it. It may be different than the color of the observed specimen and is representative of the true color of a mineral that does not include impurities or traces of other minerals, or has been irradiated or heated.
The residue is the paint powder.
I am guessing you do K12 online schooling and the answer is a streak.
It is called the streak test. It can help identify the mineral by the color of the streak that is left.