0
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.
ALSO
Topaz is harder than unglazed porcelain (the streak plate), and therefore normally leaves a scratch rather than a streak.
What else can I help you with?
Can all minerals produce a streak on a porcelain plate?
Those minerals that are harder than the unglazed porcelain streak plate will scratch it rather than leave a streak.
What is the streak of halite?
The streak of halite is white. When rubbed against an unglazed porcelain plate, it leaves a white streak due to its softness and composition of sodium chloride.
What materials do you need to test the streak?
To test the streak of a mineral, you will need a streak plate (unglazed porcelain), the mineral sample, and a way to scratch the mineral against the streak plate to observe the color of the powder residue left behind.
Why do field geologist usually carry a small plate of unglazed porcelain what is it used to test?
it is used to test streak, for rocks and minerals
What is a streak plate on the mohs scale?
A streak plate on the Mohs scale is a piece of unglazed porcelain used to determine the color of a mineral in powdered form. By rubbing the mineral against the streak plate, it leaves a streak that can be compared to the standard colors on the scale to identify the mineral.
Can all minerals produce a streak on a porcelain plate?
Those minerals that are harder than the unglazed porcelain streak plate will scratch it rather than leave a streak.
What is a piece of unglazed porcelain to test a mineral's streak called?
A streak plate
What is a piece of unglazed porcelain used to to test mineral's streak?
It's called a streak plate.
If a mineral doesn't make a streak is it not a mineral?
Minerals with a hardness greater than around 7 on the Mohs hardness scale will not leave a streak on a standard unglazed porcelain streak plate. They will instead scratch and powder the streak plate.
What refers to the color left behind when a mineral is rubbed across a unglazed porcelain plate?
streak
What refers to the color left behind when a mineral's is rubbed across and unglazed porcelain plate?
Which mineral leaves a green-black powder when rubbed against an unglazed porcelain plate?
Will diamond leave a streak on a 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.
What is the streak of halite?
The streak of halite is white. When rubbed against an unglazed porcelain plate, it leaves a white streak due to its softness and composition of sodium chloride.
What is the streak of talc?
Talc has a streak color of white. This means that when scraped across a white, unglazed porcelain plate, talc leaves behind a white streak.
What materials do you need to test the streak?
To test the streak of a mineral, you will need a streak plate (unglazed porcelain), the mineral sample, and a way to scratch the mineral against the streak plate to observe the color of the powder residue left behind.
How is a minterals streak determinded?
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.
Why do field geologist usually carry a small plate of unglazed porcelain what is it used to test?
it is used to test streak, for rocks and minerals
