Streak and Mohs hardness are descriptive and identifying terms for minerals. Because sandstone could be composed of a multitude of different rock particles or minerals, a specific hardness or streak cannot be attributed to them.
The streak color of sandstone is typically white or colorless, due to its composition of quartz grains. This can be tested by rubbing the sandstone on a streak plate to observe the color left behind.
No one knows.
The hardness level of sandstone typically ranges from 6 to 7 on the Mohs scale, making it a relatively soft to medium-hard rock. The specific hardness can vary based on the composition and grain size of the sandstone.
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.
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.
The streak color of sandstone is typically white or colorless, due to its composition of quartz grains. This can be tested by rubbing the sandstone on a streak plate to observe the color left behind.
No one knows.
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.
The hardness level of sandstone typically ranges from 6 to 7 on the Mohs scale, making it a relatively soft to medium-hard rock. The specific hardness can vary based on the composition and grain size of the sandstone.
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.
No. Streak color is distinct of mineral hardness. They are separate properties.
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.
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)
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.
Rocks are not considered to have a streak, as they may consist of several minerals. In the case of sandstone, the rock could be composed of feldspar, quartz, glauconite, and other minerals. Minerals in solutions can penetrate and stain the sandstone as well and affect the attempted 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.
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.