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Would the hardness of a mineral affects its performance in the streak test why or why not?
No, the hardness of a mineral does not affect its performance in the streak test. The streak test measures the color of the powdered form of a mineral when it is scratched against a streak plate, regardless of the mineral's hardness.
What are the hardness and streak of granite?
Granite is a hard igneous rock with a hardness of around 6-7 on the Mohs scale. Its streak is typically colorless, leaving no streak on a streak plate.
What color streak does graphite have?
The same color as the writing from a pencil, very dark grey or black. Pencils used to be made of graphite
Would the hardness of a mineral affect its performance in the streak test?
No, the hardness of a mineral does not affect its performance in the streak test. The streak test is determined by the color of the powder left behind when the mineral is scratched against a ceramic plate, not the hardness of the mineral itself.
What is Cobalts mineral streak color?
Yes. Its Mohs hardness is in the range of 5, and minerals (or metals, as is the case here) will streak up to a hardness of about 7. For a quick review of what streak is and how it originated, use the link to the Wikipedia article.
What is the streak color for pencil lead?
The color of pencil lead streak is usually gray or black, depending on the hardness of the lead. The softer the lead, the darker the streak it creates.
Would the hardness of a mineral affects its performance in the streak test why or why not?
No, the hardness of a mineral does not affect its performance in the streak test. The streak test measures the color of the powdered form of a mineral when it is scratched against a streak plate, regardless of the mineral's hardness.
What is the streak color of pencil lead?
The streak color of pencil lead is typically a shade of grey.
What are the hardness and streak of granite?
Granite is a hard igneous rock with a hardness of around 6-7 on the Mohs scale. Its streak is typically colorless, leaving no streak on a streak plate.
What color streak does graphite have?
The same color as the writing from a pencil, very dark grey or black. Pencils used to be made of graphite
Would the hardness of a mineral affect its performance in the streak test Why or why not?
No. Streak color is distinct of mineral hardness. They are separate properties.
What are 2 minerals that don't leave a streak on a streak plate?
Two minerals that do not leave a streak on a streak plate are quartz and fluorite. Both minerals have a hardness higher than that of the streak plate, so they will not leave a streak when rubbed against it.
What diamonds streak?
Diamonds are the hardest substance on Moe's Hardness Scale and as such don't have a determined streak color (since streak is determined usually by a clay tablet of hardness ~3)
What mineral will scratch glass but not a streak plate?
Diamond is the only mineral that can scratch glass but not leave a streak on a streak plate. Glass has a hardness of around 5.5 on the Mohs scale, while a streak plate typically has a hardness of around 6.5. Diamond, with a hardness of 10, is able to scratch glass but not the streak plate.
Would the hardness of a mineral affect its performance in the streak test?
No, the hardness of a mineral does not affect its performance in the streak test. The streak test is determined by the color of the powder left behind when the mineral is scratched against a ceramic plate, not the hardness of the mineral itself.
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 is the hardness of a porcelain streak plate?
Porcelain has a Mohs hardness of approximately 6-7, making it a relatively hard material. This hardness allows porcelain to be used as a streak plate in mineral testing to determine the color of a mineral's powder when scratched against it.
