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      GEOLOGY LABORATORY: MINERAL PROPERTIES

      2012 8 28 · Minerals with a metallic luster look like a metal, such as steel or copper. They are both shiny and opaque, even when looking at a thin edge Many metallic minerals . become dull or earthy when they are exposed to he elementst for a long time (like silver, they tarnish). To determine whether or not a mineral has a metallic luster,

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      Mineral Properties The Mineral and Gemstone

      They use these techniques to identify minerals. For the most part, though, minerals can be identified by conducting a few simple, costless tests. Once a person becomes experienced in this field, he can usually identify a mineral by observing it and taking into account its

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      Minerals and Rocks lab info Kwantlen Polytechnic

      2015 5 14 · MINERALS To introduce minerals and rocks, we must understand a little bit of chemistry. The terms ... Most common minerals can be identified by observing certain readily ... Metallic lustre: minerals that look like a metal are said to have metallic lustre.

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      How to Identify Minerals in 10 Steps thoughtco

      Metallic minerals may have a hackly (jagged) fracture. A mineral may have good cleavage in one or two directions but fracture in another direction. To determine cleavage and fracture, you'll need a rock hammer and a safe place to use it on minerals. A magnifier is also handy, but not required. Carefully break the mineral and observe the shapes ...

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      Luster: Mineral Properties The Mineral and

      Metallic Minerals with a metallic luster are opaque and reflective, like metal. The metallic elements, most sulfides, and some oxides belong in this category. Submetallic Describes a mineral that is opaque to nearly opaque and reflects well. Thin splinters or sections of submetallic minerals are translucent.

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      Mineral Hardness

      The degree of hardness is determined by observing the comparative ease or difficulty which which one mineral is scratched by another. ... Metallic Minerals by Hardness and Streak. Non Metallic Minerals by Hardness and Streak. Graph showing the distribution of hardness values by Dana mineral classification.

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      PDF Observing Color, Luster, and Cleavage (continued)

      2006 7 10 · are some minerals, such as sulfur, that can be identifi ed by color. 4.Students sort minerals by luster. Remind students that luster is the way in which some thing refl ects light. Explain that all minerals have luster. When sorting mineral samples by luster, geologists begin by observing which minerals have metallic luster and which do not.

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      Streak: Mineral Properties The Mineral and

      Most light colored, non metallic minerals have a white or colorless streak, as do most silicates, carbonates, and most transparent minerals. The streak test is most useful for identifying dark colored minerals, especially metals. How to use streak as an identification mark. When testing for streak, the mineral must be crushed to determine the ...

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      How to Identify Black Minerals thoughtco

      Pure black minerals are less common than other types of minerals and can sometimes be difficult to recognize if you don't know what to look for. However, by carefully observing such things as grain, color , and texture and studying their most notable characteristicsincluding luster and hardness as measured on the Mohs Scale you should ...

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      Properties of Minerals rocksandminerals4u

      Trace minerals have little influence on the reflection of the small powdery particles of the streak. The streak of metallic minerals tends to appear dark because the small particles of the streak absorb the light hitting them. Non metallic particles tend to reflect most of

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