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A query to mindat.org, a mineral database, revealed almost 100 minerals listed with a streak of brown. Two fairly familiar minerals named were schorl and chromite.
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Does gabbro have a streak?
Only minerals have a streak, not rocks. The constituent minerals of a gabbro will all have a streak.
Why do some very hard minerals leave no streak?
Some minerals are harder than a streak plate and will therefore leave no streak or the powder of the ceramic streak plate.
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 is the color of a minerals powder called?
there is no name for the color, but there is the "streak" of a mineral, meaning the color of its streak.
What are 2 minerals that don't leave a streak on a streak plate?
A streak plate has hardness of 7 on the Mohs scale, so harder minerals will not leave a streak. Diamond has a hardness of 10 and corundum is 9 - so neither will leave a streak.
Does gabbro have a streak?
Only minerals have a streak, not rocks. The constituent minerals of a gabbro will all have a streak.
Why is streak an important physical property of minerals?
A streak test is used to determine a minerals streak color. This can help in the identification of minerals.
Why do some very hard minerals leave no streak?
Some minerals are harder than a streak plate and will therefore leave no streak or the powder of the ceramic streak plate.
What is the streak of amphibole?
the answer to this question is brown ish red, like Jacob in new moon
What is the color of a mineral in powder form?
It's called the minerals streak
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.
What test is used to identify a minerals color?
A streak test is used to determine a minerals streak color. This can help in with the identification of minerals. A streak test is performed by rubbing the mineral on an unglazed ceraminc tile, then observing the color of the streak which is left behind. All minerals do not leave streaks. Harder minerals will not streak, but this can also be used as a tool for identifying the mineral, if you are familiar with the hardness scale.
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 is the color of a minerals powder called?
there is no name for the color, but there is the "streak" of a mineral, meaning the color of its streak.
What kind ok streak do metallic minerals generally have?
dark streak
What are 2 minerals that don't leave a streak on a streak plate?
A streak plate has hardness of 7 on the Mohs scale, so harder minerals will not leave a streak. Diamond has a hardness of 10 and corundum is 9 - so neither will leave a streak.
How can the streak test be used to identify the two iron minerals limonite and hematite?
Hematite has a red streak. It can vary in depth of color, depending on the variety of hematite. Limonite has a yellow-brown (More brown than yellow) streak. But you have to make sure you are streaking the limonite and not an underlying mineral, if the limonite is located on another mineral.
