Front | Back |
Mineral
|
A naturally occurring inorganic solid with a definite chemical composition crystalline structure.
|
Element
|
A substance that cannot be broken down into other substances by ordinary chemical means.
|
Rock Forming Minerals
|
Minerals in the Earth's crust that combined to make most rocks.
|
Crystal
|
A solid element or compound whose atoms are arranged in a regular, periodically, repeated pattern.
|
Cleavage
|
The tendency of some minerals breaks other than along planes of cleavage
|
Crystal face
|
The flat surface that develops if a crystal grows freely in an uncrowded environment
|
Fracture
|
A manner in which a mineral breaks other than along planes of cleavage.
|
Hardness
|
The resistance of a mineral to scratching
|
Streak
|
The color of the fine powder of a mineral
|
Luster
|
The quality and intensity of light reflected from the surface of a mineral.
|
Ore Minerals
|
Minerals from which metals or other elements can be profitably recovered.
|
Industrial Minerals
|
Rocks or minerals that have economic value exclusive of metal ores, fuels, and gems.
|
Gem
|
A mineral that is prized for its rarity and beauty rather than industrial use.
|
What are the two most abundant elements in the Earth's crust? What percent does they each make i weight?
|
Oxygen and Silicone. 75%
|
Even though there are over 3500 minerals known, how many rock forming mineral groups are there?
|
9 groups
|