The hardness of a porcelain streak plate will vary between 6.5-7.5 on the Mohs hardness scale.
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.
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.
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.
i don't think it does because on the mohs hardness scale its a 8-9 that's a lot considering diamond is a 10 and is the hardest known thing.
Corundum has a streak that is typically colorless, making it difficult to determine on a streak plate. The hardness of corundum (9 on the Mohs scale) can also affect the accuracy of the streak test, as it can scratch the streak plate instead of leaving a distinct streak.
Those minerals that are harder than the unglazed porcelain streak plate will scratch it rather than leave a streak.
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.
A mineral that can scratch glass but not a streak plate is quartz. Quartz has a hardness of 7 on the Mohs scale, which allows it to scratch glass (which has a hardness of about 5.5) but is harder than the streak plate, typically made from porcelain, which has a hardness of around 6-7. Therefore, while quartz can leave scratches on glass, it will not produce a streak on a streak plate.
Quartz does not leave a streak behind when rubbed against a streak plate. This is because quartz has a hardness of 7 on the Mohs scale, making it harder than the streak plate, which is typically made of porcelain and has a hardness of around 6. As a result, quartz will not produce a colored streak and will instead leave a scratch on the plate.
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.
The white line left behind when dragging calcite across an unglazed porcelain plate relates to the mineral's hardness and its ability to leave a streak. This characteristic is often used in mineral identification, where the streak color can help distinguish between different minerals. Calcite has a hardness of 3 on the Mohs scale, allowing it to produce a visible streak on the porcelain surface.
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.
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.
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.
Hardness is a mineral's resistance to being scratched, while streak is the color of the powder a mineral leaves behind when scratched on a porcelain streak plate. Hardness is measured on the Mohs scale from 1 (softest) to 10 (hardest), while streak is a diagnostic property used to identify minerals.
A streak plate
Mineral hardness measures a mineral's resistance to scratching, while streak is the color of the powdered form of a mineral. Hardness is determined by the Mohs scale, while streak is identified by rubbing the mineral across a porcelain plate to see the color left behind.