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What else can I help you with?
How do you determine the streak of a mineral whose Mohs scale is higher than the streak plate?
You can determine the streak of a mineral whose Mohs scale is higher than the streak plate by either filing or crushing with a hammer before rubbing the sample on a streak plate.
Which minerals on the Mohs scale will not leave a streak on the streak plate?
Topaz (8), corundum (9), and diamond (10).
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.
When you rub a pumice rock on a streak plate what color is left on the streak plate?
The streak left on the streak plate by rubbing a pumice rock usually appears white or colorless. This is because pumice is a light-colored rock composed of volcanic glass with a frothy texture due to gas bubbles trapped in the rock, causing it to create a light streak when rubbed on a streak plate.
What is perlite's streak color?
Perlite does not have a streak color because it is a volcanic glass that does not leave a streak on a streak plate.
Could some bacteria grow on the streak plate and not be seen using the pour plate technique?
Put simply - yes. Some strictly aerobic organisms will not grow in a pour plate. They may, however proliferate on a streak plate. Also consider the posibility of experimental error. The culture may have been added to the molten agar when it was too hot for the organisms to survive.
What is the purpose of the plate?
A streak plate is used to determine the streak colour of a mineral. You take the mineral and scratch it against the streak plate, and it will create a coloured streak on the plate. The streak is not always the same colour as the mineral itself.
What happens if you rub the mineral across a streak plate but the mineral does not leave a streak?
The lack of a streak would indicate that the mineral is harder than the streak plate, or the color of the streak is the same as the color of the streak 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.
Can you show me a picture of a streak plate that has a streak from aquamarine on it?
I do not have a picture, but when you scratch aquamarine on a streak plate, the powder will be white colored.
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.
How do you determine the streak of a mineral whose Mohs scale is higher than the streak plate?
You can determine the streak of a mineral whose Mohs scale is higher than the streak plate by either filing or crushing with a hammer before rubbing the sample on a streak plate.
What is the powder left behind on a streak plate called?
The powder left behind on a streak plate is called a streak. It is produced by scraping a mineral sample across the plate to reveal its color and texture. This streak can be compared to a mineral's known streak color to help with identification.
Why doesn't the mineral topaz leave a streak on a streak plate?
It leaves a scratch instead of a streak because Topaz has a higher number on the Moh's scale compared to the streak plate.
Which minerals on the Mohs scale will not leave a streak on the streak plate?
Topaz (8), corundum (9), and diamond (10).
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.
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.
