GeologyLStuGui

GeologyLStuGui - Chapter 1 Mineral: a naturally occurring,...

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Chapter 1 Mineral : a naturally occurring, inorganic solid with a crystalline structure Luster : describes the manner in which light is reflected from the surface Metallic Luster: any material that shines with a metallic like luster Opaque : when no light is transmitted Translucent : when a light but no image is transmitted Transparent : when an image is visible through the mineral Hardness : a measure of the resistance of a material to abrasion or scratching -most reliable diagnostic property -a relative property (a harder substance will scratch or cut into a softer one) Streak : the color of the fine power of a mineral obtained by rubbing a corner across a streak plate Crystal Form : the external appearance or shape of a mineral that results from the arrangement of atoms Cleavage : the tendency of some minerals to break along regular planes of weak bonding between atoms Cleavage Plane: when broken, minerals that exhibit smooth, flat surfaces Direction of Cleavage : the number of different sets of planes that form the surfaces of a mineral Fracture : minerals that do not exhibit cleavage when broken
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GeologyLStuGui - Chapter 1 Mineral: a naturally occurring,...

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