Minerals are the earth’s inorganic solid material that have an orderly chemical structure and can be identified by physical properties.
Minerals are aggregated to form rocks (collected together) Moh’s Scale Scale used to identify hardness of a mineral 1 very soft (Talc- scratch with finger nail) 7 and above are extremely hard (quartz- can’t even scratch with metal object) Color- 2 types - actual color of mineral - the color of the streak on a piece of tile Cleavage- is the way it breaks apart Number of sides after we smash it or break it apart Fracture- is the type of edges that form Luster- how it reflects light Specific Gravity- The density of the mineral as compared to water Cleavage and Fracture has to do with the way it breaks If I smash it with a hammer and it breaks in a specific way- it has cleavage If I smash it and it doesn’t have a specific pattern- it fractures
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April 2010
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