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Some minerals are harder than a streak plate and will therefore leave no streak or the powder of the ceramic streak plate.
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∙ 14y ago
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What isn't a streak test used to help identify every mineral?
Because some minerals have the same color streak, don't have a streak, or the streak is hard to see
Why can't the streak test be used to identify all minerals?
Because some minerals dont have a streak, or may share a streak colour with another mineral.
What tool is used to test a minerals color?
A white tile plate is used. Some minerals leave a streak; others don't.
Why are some minerals easier to identify than others?
Minerals vary in ways they can be distinduished. Some are easy to identify by hardness, color , streak, or luster
Why is using a minerals streak more reliable then using color to Identify a mineral?
Some minerals can be the same color but have different streaks.
How is a minterals streak determinded?
Streak color is determined by scraping the mineral across a a streak plate, (which is made of unglazed porcelain), and then observing the color of the streak, which is left on the plate. Note that some minerals do not leave a streak, as they are too hard. Thus, it is important to learn other identification methods, to use in conjunction with streak color, in order to identify minerals.
What isn't a streak test used to help identify every mineral?
Because some minerals have the same color streak, don't have a streak, or the streak is hard to see
What does streak mean in science term?
In mineralogy, streak is the powder from a mineral when you rub it against a light colored hard surface. Streak is used to identify some minerals.
When some minerals are rubbed across unglazed porcelain they leave a streak of powdered material true or false?
True
Why can't the streak test be used to identify all minerals?
Because some minerals dont have a streak, or may share a streak colour with another mineral.
What tool is used to test a minerals color?
A white tile plate is used. Some minerals leave a streak; others don't.
The calor a mineral leaves when it is rubbed across a plate?
Streak is the color of the finely powdered mineral when rubbed across a plate. Streak is one of the physical properties of minerals used to identify which specific mineral it is. Some minerals leave a completely different color streak than the original color of the whole mineral.
What color is porcelain dishes?
Different minerals produce different colour powders (know as the mineral's 'streak') when scratched. For instance, hematite has a red streak, calcite has a white streak and graphite has a black streak. There is also variation within some minerals, depending on impurities. It should be noted that some minerals are too hard to be scratched by porcelain, and will instead powder the porcelain, producing a misleading white streak.
Does the streak test work with all minerals?
No it does not work with all minerals. For if you did not know streak plates have a hardness of 7 (maybe a little lower or higher) on the Mohs scale. Some minerals are harder than 7 though. If they are harder they will not work with the streak test. some examples are Diamond, topaz, and corundum.
What can you rub a mineral on to leave a clue what the mineral?
A streak plate, or unglazed white porcelain tile, is used to perform streak tests which can help to identify minerals. Rubbing the mineral on the streak plate will finely powder it and reveal the color of the powder, which in some cases is quite different from the color of the mineral. Eg: hematite is black but has a red streak - a good way to tell you have hematite instead of one of the many other shiny black minerals.
Why are some minerals easier to identify than others?
Minerals vary in ways they can be distinduished. Some are easy to identify by hardness, color , streak, or luster
Why isn't streak used to identify every mineral?
cause some minerals have the same color streak as others
