Those minerals that are harder than the unglazed porcelain streak plate will scratch it rather than leave a streak.
Shale is a type of rock, not a mineral. Streak is used to help classify minerals. It can leave a streak, but it doesn't mean anything.
It leaves a brown streak.
Regardless of the color of the garnet specimen, it would leave a white streak.
Topaz will leave a streak, it is just that the streak is white and will therefore not be apparent against the white background of the standard streak plate.ALSOTopaz is harder than unglazed porcelain (the streak plate), and therefore normally leaves a scratch rather than a streak.
limestone has a white streak.
white white white
Graphite is a mineral that does not leave a clear streak.
A streak plate has hardness of 7 on the Mohs scale, so harder minerals will not leave a streak. Diamond has a hardness of 10 and corundum is 9 - so neither will leave a streak.
The Streak Is White.
It doesn't leave a streak.
Some minerals are harder than a streak plate and will therefore leave no streak or the powder of the ceramic streak plate.
Diamond will not leave a streak on a porcelain streak plate because diamond is harder than the streak plate. It will leave a scratch on the streak plate for the same reason.
Flint would have a white streak.
Those minerals that are harder than the unglazed porcelain streak plate will scratch it rather than leave a streak.
Shale is a type of rock, not a mineral. Streak is used to help classify minerals. It can leave a streak, but it doesn't mean anything.
It leaves a brown streak.