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Minerals
Minerals of Earth
10
Science
6th Grade
02/15/2012

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Term
Mineral
Definition
A solid material. not comprised of organisms, that occurs in nature on or beneath the Earth's surface
Term
Inorganic
Definition
Not comprised of living organisms
Term
Crystal
Definition
A solid substance comprised of repetitively patterned atoms.
Term
Hardness
Definition
A classification system based on the Moh's Hardness Scale: a system of observing what mineral can scratch what substance (mineral or otherwise.
Term
Streak
Definition
A classification system based on the color of the powder left when a mineral is scratched against an unglazed tile.
Term
Lustre
Definition
A classification system based on how reflective the surface of a mineral is. It is divided into two main categories: metallic and non-metallic. The non-metallic category is divided into five sub-sections: glassy, brilliant, earthy, pearly, and silky.
Term
Fracture
Definition
The property of minerals in which, when broken, the mineral fragments are rough and jagged and can take a variety of forms.
Term
Density
Definition
A classification system based on the amount of mass in a certain volume (m/v). Every mineral has its own distinct density.
Term
Gemstone
Definition
A type of mineral that is highly valued by humans because of fine color, lustre, and hardness. They are often utilized in machinery or cut into gems to make jewelry.
Term
Cleavage
Definition
The property of minerals in which, when broken, it is easily created into a thin, smooth-surfaced fragment.
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