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What color does garnet leave on a streak plate?
Garnet typically leaves a colorless streak on a streak plate due to its hardness.
Would the streak of garnet be difficult to determine?
Determining the streak of garnet can be challenging because it varies depending on the specific type of garnet. In general, garnet typically has a white streak, but some varieties may leave a slightly different colored streak due to impurities. It's best to use a streak test plate to compare and determine the actual color of the streak.
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.
What mineral has a hardness of 7 is red no streak color and a specific gravity of 2.65?
The mineral described is likely garnet. Garnet has a hardness of 7, is commonly red in color, has no streak color, and a specific gravity of around 2.65.
What color streak does copper have?
Copper typically has a streak color that appears reddish-brown. This streak color can be seen when copper is scratched on a streak plate to leave a mark.
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.
What is aluminum's streak?
Aluminum does not have a distinct streak color because it is a metallic element. When tested for streak, aluminum will leave a silvery line resembling its natural color.
Does a ruby have a streak?
Yes, rubies do have a streak. Rubies typically leave a red streak when scratched on a white porcelain streak plate. The streak color is an important identification characteristic for gemstones.
Why is a ruby streak color colorless?
A ruby's streak color appears colorless because as a mineral, ruby typically does not leave a streak when rubbed against a streak plate. The color of a mineral's streak is caused by the powdered form of the mineral, revealing its true color when scratched against a ceramic plate, but in the case of ruby, its hardness and structure prevent it from leaving a visible streak.
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 color streak does the mineral nickel leave?
Nickel typically leaves a greenish-black streak when it is scratched on a 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.
