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All about Minerals

Minerals

TermDefinition
Mineral a naturally occurring, inorganic solid with a definite structure and composition.
inorganic aren't alive, never were alive, and are not made by life processes.
solid has a definite volume and shape.
crystal a solid in which the atoms are arranged in repeating patterns.
Formation of Minerals 1) if a solution becomes saturated or filled with another substance. 2) from minerals dissolved in liquids. 3) from the cooling of hot melted rock material, called magma.
Friedrich Mohs a German scientist who developed the Mohs Scale of hardness. (lists hardness of 10 minerals with 1 being the softest and 10 the hardest).
Luster physical property of a mineral that describes how light is reflected from its surface. Is defined as either metallic or nonmetallic.
Metallic always shine like metal.
Nonmetallic don't shine like metal.
Color usually isn't enough alone to identify a mineral.
Streak color of a mineral when it is powedered; usually observed by rubbing the mineral on a ceramic streak plate.
Silicates minerals that contain silicon and oxygen and usually one or more other elements.
Rock Salt real name is halite and has a cubic crystal shape.
Hardness a measure of how easily a mineral can be scratched.
Talc is the softest mineral and can be scratched with your fingernail.
Diamond hardest mineral and it can only be scratched by another diamond.
Cleavage physical property of a mineral that causes it to break along smooth, flat surfaces.
Mica has a perfect cleavage.
Fracture physical property of a mineral that causes it to break with rough or jagged edges.
Quartz has fracture. has atoms arranged in repeating patterns, but you can't see the crystal structure on the outside of the mineral.
Magnetite attracted to magnets.
Calcite fizzes when hydrochloric acid is put on it. causes you to see a double image.
Gem a valuable mineral highly prized because it is rare and beautiful.
Ore a mineral containing a useful substance such as a metal that can be mined at a profit.
Titanium durable, lightweight metal derived from minerals such as ilmenite or rutile.
Created by: Rach on 2005-06-06



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