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The hardness of a porcelain streak plate will vary between 6.5-7.5 on the Mohs hardness scale.

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16y ago

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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.


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 mineral will scratch glass but not a sreak 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.


Does quartz leave a streak behind?

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.


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.


When you drag a piece of calcite across an unglazed porcelain plate itleaves behind a white line. what mineral characteristic does this relate to?

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.


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 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.


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 is difference between hardness and streak?

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.


What is a piece of unglazed porcelain to test a mineral's streak called?

A streak plate


What is the difference between a minerals hardness and streak?

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.