what physical property is defined as the comparative property that reflects the ability of a mineral to resist scratching?
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High School Earth Science/Identification of Minerals Hardness is a mineral's ability to resist being scratched. Minerals that are not easily scratched are hard. You test the hardness of a mineral by scratching its surface with a mineral of a known hardness. Mineralogists use Mohs Scale, shown in Table 3.2, as a reference for mineral hardness.
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Properties of Minerals Because streak is a more accurate illustration of the mineral’s color, streak is a more reliable property of minerals than color for identification. Hardness is one of the better properties of minerals to use for identifying a mineral. Hardness is a measure of the mineral’s resistance to scratching.
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Rocks and Minerals Streak is the color when a rock is rubbed across an unglazed piece of porcelain. Streak is much more useful than color because a mineral always has the same streak, but it still has its limits because minerals harder than the streak plate will scratch the streak plate instead of producing powder. Luster
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- Any mineral with roughly a hardness of 6 or more on the Mohs scale of mineral hardness could scratch glass, which is … Some minerals that could scratch glass would be quartz, topaz, corundum, and diamond. … Any type of feldspar or quartz. »More detailed.
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High School Earth Science/Identification of Minerals Lesson Summary. 1  You can identify a mineral by its appearance and other properties. 2  The color and luster describe the appearance of a mineral, and streak describes the color of the powdered mineral. 3  A mineral has a characteristic density. 4  Mohs hardness scale is used to compare the hardness of minerals.
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- Mineral Properties. In order to use this Key and the test kit described above, you need to understand some basic properties of minerals. The most important are: luster, streak, hardness, and cleavage.
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MINERAL PROPERTIES: STREAK Streak is the color of a crushed mineral's powder. The color of a mineral's powder may differ from the actual color of the mineral. This property can be useful for mineral identification. Almost every mineral has an inherent streak color, no matter what color the actual mineral is.
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- Definition of hardness. 1  1 : the quality or state of being hard. 2  2a : the cohesion of the particles on the surface of a mineral as determined by its capacity to scratch another or be itself scratched — compare mohs' scaleb : resistance of metal to indentation under a static load or to scratching.
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- Merge this question into. Split and merge into it. Answer by Faukerz. Confidence votes 276. The luster of a mineral is the way its surface reflects light. Most terms used to describe luster are self-explanatory: metallic, earthy, waxy, greasy, vitreous (glassy), adamantine (or brilliant, as in a faceted diamond).uster refers to how a mineral reflects light. It is usually metallic, glassy, or dull. Luster can also used to describe different kinds of minerals.
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Properties of Minerals Streak is the color of the mineral in powdered form. Streak shows the true color of the mineral. In large solid form, trace minerals can change the color appearance of a mineral by reflecting the light in a certain way. Trace minerals have little influence on the reflection of the small powdery particles of the streak.
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- A mineral's streak color may differ from the color of the mineral itself. This characteristic is most useful for minerals that are relatively soft (have a hardness less than 7) and which have a characteristic streak color. mineral is able to scratch a mineral with a lower number and can, therefore be scratched by a mineral with a higher number. (The links are to photographs of samples of the minerals. Place your mouse over each image link to view it in a separate window. Close the window to return to this page and continue.
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Mineral Properties Mineral Properties. A mineral is a naturally-occurring, inorganic solid which possesses a characteristic internal atomic structure and a definite chemical composition. If we take the definition of a mineral term by term, it becomes easier to understand: Minerals must occur naturally.
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- 1 Hold the sample and attempt to scratch it with the point of the object of known hardness by pressing the object firmly but lightly against the unknown sample.  Inspect for an etched line When a mineral is scratched, a permanent indentation is created and powder of the softer mineral will come off.
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Minerals of the Earth's Crust The measure of the ability of a mineral to resist something. measured on Mohs scale ex - Talc is soft #1
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Streak Test. Rub the mineral across an unglazed white porcelain plate and describe the colour of the powder left on the plate, i.e. the streak. Notes: This is often a useful property for identifying opaque minerals which can have a streak colour that differs markedly from their apparent colour. For example pyrite is gold coloured, but its streak is greenish-black. Most pale coloured or transparent to translucent minerals have a non-determinative white streak.
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What are the five defining characteristics of minerals? Confidence votes 33. Five physical characteristics of a mineral are: hardness, luster, diaphaneity, colour, and streak.
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- Which physical property caused the mineral to break as it did? A. hardness B. luster C. cleavage D. streak 4. A mineral’s crystal shape and cleavage are a direct result of the mineral’s A. hardness B. abundance in nature C. arrangement of atoms D. exposure to the hydrosphere and atmosphere 5. Base your answer(s) to the following question(s)
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- Mohs Hardness Scale Lab Lancaster High School Hayhurst Page 3 Analysis and Conclusion For each item below, select the letter that labels the correct part of the image. _____ 1. Mineral cannot scratch glass but scratches a fingernail. _____ 2. Mineral scratches glass but is scratched by quartz. _____ 3. Mineral scratches quartz and topaz. _____ 4.
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Mohs scale of mineral hardness The Mohs scale of mineral hardness is based on the ability of one natural sample of mineral to scratch another mineral visibly. The samples of matter used by Mohs are all different minerals.
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- Color, luster, streak, hardness, cleavage, fracture, and crystal form are the most useful physical properties for identifying most minerals. Other properties-such as reaction with acid, magnetism, specific gravity, tenacity, taste, odor, feel, and presence of striations-are helpful in identifying certain minerals.
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Mineral Minerals can be described by various physical properties which relate to their chemical structure and composition. Common distinguishing characteristics include crystal structure and habit, hardness, lustre, diaphaneity, colour, streak, tenacity, cleavage, fracture, parting, and specific gravity.
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- Answers to Chapter 2 Review Questions. 1  1. To be considered a mineral, a substance must exhibit the following characteristics: (1) be naturally occurring, (2) be a solid, (3) have an orderly crystalline structure, (4) have a definite chemical composition, and (5) generally be inorganic.
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Mineral Gemstones Mineral Gemstones. Hardness and specific gravity are two of the major characteristics of gemstones. Hardness of a gemstone is its resistance to scratching and may be described relative to a standard scale of 10 minerals known as the Mohs scale. F. Mohs, an Austrian mineralogist, developed this scale in 1822.
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Mineral This physical property is controlled by the chemical composition and crystalline structure of a mineral. A mineral's hardness is not necessarily constant for all sides, which is a function of its structure; crystallographic weakness renders some directions softer than others. An example of this property exists in kyanite, which has a Mohs hardness of 5½ parallel to [001] but 7 parallel to [100].
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Physical Properties of Minerals There are different ways for people to identify minerals. A few physical properties that are used include hardness, luster and streak color. Clicking on the Physical Properties of Minerals title will open up an interactive slideshow that introduces students to some physical properties of minerals.This interactive slide show exemplifying different physical properties used to identify minerals is a great way to introduce the concept. few physical properties that are used include hardness, luster and streak color. Clicking on the Physical Properties of Minerals title will open up an interactive slideshow that introduces students to some physical properties of minerals.