Minerals can be identified through color, luster, and streak.
Minerals can be identified using various physical properties. Two ways to identify minerals are by their color, luster, and streak. Color provides a general idea, luster describes how light reflects off the surface, and streak is the color of the mineral in powdered form.
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Answer:Minerals can be identified by their physical and chemical properties:
Physical properties
These properties are determined by the mineral's atomic structure and crystal chemistry. Some common physical properties include:
Color: Some minerals can be recognized by their color, such as azurite's deep blue or malachite's green. However, color can be highly variable, so it's not always the best tool for identification.
Crystal form: Examining a mineral's external shape can be one of the best ways to identify it. For example, biotite and hornblende are both black, but biotite occurs in sheets, while hornblende forms stout.
Cleavage: Minerals can cleave into polygons, such as fluorite's octahedrons or mica's sheets.
Chemical composition
The main elements in a mineral's chemical formula determine its color. For example, copper (Cu) causes azurite to be blue and malachite to be green.
Explanation: