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Why is the streak color more reliable than mineral color as a identifying charactist?
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What is the most reliable clue in identifying a mineral?
hardness, luster, cleavage and fracture, color (not quite useful) and streak
Why is streak more reliable than color when identifying a mineral?
The streak is the mineral in a powdered form from abrasion with the hard, slightly textured surface of an unglazed porcelain streak plate. The streak color may differ from the color observed in a specimen. Coloration of mineral specimens is sometimes due to impurities. In a powdered form, the impurities are not abundant enough to cause coloration in the streak, thus revealing the true color of the mineral. == ==
What is color of powdered minerals?
it can be white or gray but the word is STREAK
What mineral leaves a colorless streak?
The mineral Quartz leaves a colorless streak.
What is the difference between color and streak in minerals?
Color is the observable color of a mineral specimen in natural light. Streak is the color of a mineral when powdered. The color of a specific mineral specimen may be different than its streak color. Because many impurities can alter the color of a mineral, but not the streak, streak is a more accurate predictor in mineral identification.
What is the streak for a mineral used for?
identifying the mineral
A streak can be helpful identifying what mineral?
A streak test can be helpful identifying any minerals!
How do you identify minerals according to streak?
Minerals can be identified by their streak, which is the color of the mineral when it is broken down into a powder. To test a mineral's streak, a streak plate (usually made of unglazed porcelain) is used. The streak is usually compared to a streak color chart, which contains the colors of a variety of minerals. To test a mineral for its streak, take a small piece of the mineral and rub it on the streak plate. The resulting powder is then compared to the streak chart to identify the mineral. Streak is an important property of minerals because it is more reliable than the external color of the mineral. External color can be altered by impurities and oxidation, but the streak of a mineral does not change. Therefore, testing a mineral's streak is an effective way of identifying it.When identifying minerals according to streak, it is important to consider the following properties: Color - the color of the powder when rubbed on the streak plate. Luster - the shine of the powder when rubbed on the streak plate. Texture - the feel of the powder when rubbed on the streak plate. Opacity - the transparency of the powder when rubbed on the streak plate.By considering these properties when testing a mineral's streak, it is possible to identify the mineral accurately and quickly.
What is the most reliable clue in identifying a mineral?
hardness, luster, cleavage and fracture, color (not quite useful) and streak
Color of powered mineral?
It's referred to as the streak, the color of which is used as an identifying characteristic of minerals.
What is more reliable than color as an indicator of a mineral's identity?
Streak, hardness, and crystalline structure.
Why is mineral's streak more useful in identifying a mineral than its color?
Because color can vary based on the purity of the mineral.
What is another property in identifying a mineral?
The properties in identifying minerals are color,luster,hardness,cleavage and fracture,and streak.
Is streak a good way to classify minerals?
Streak is one good way to start identifying a mineral, but poor for classification.
Why is streak more reliable than color when identifying a mineral?
The streak is the mineral in a powdered form from abrasion with the hard, slightly textured surface of an unglazed porcelain streak plate. The streak color may differ from the color observed in a specimen. Coloration of mineral specimens is sometimes due to impurities. In a powdered form, the impurities are not abundant enough to cause coloration in the streak, thus revealing the true color of the mineral. == ==
Is a minerals streak more reliable than color in identifying a mineral?
While Minerals may share apparent colours, most do not share both colour and hardness, as well as the fact that the colour can be more accurately identified from the mineral's powder.
If a mineral has no streak is it metallic?
When identifying minerals, having no streak is a property of hardness. A streak plate has a hardness of ~7(Moh's Scale). Thus any mineral having a hardness greater than 7 will have no streak.Metallic is the description of luster. Or the general appearance of a mineral surface in reflected light.If you were refering to the mineral having metal elements in it, streak is actually very useful for identifying them. Many minerals that are composed of non-metals have a white streak which can appear to be no streak, however there are also many minerals with no streak which are composed of non-metallic minerals (Diamond).
