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Minerals

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princeton luz

on 28 June 2013

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Transcript of Minerals

Minerals
By Princeton Luz
Minerals are classified according to their hardness
Minerals are solids found in nature .

They are inorganic, have ordered atomic structures and have definite chemical composition.
Rocks vs. Minerals
ROCKS
MINERALS
Collections of minerals and non-minerals
Do not necessarily have a definite chemical composition
Collection of elements and compounds
Have a definite chemical composition
PROPERTIES OF MINERALS
Color
Hardness
Crystal Structure
Streak
Cleavage
Luster
Color of Minerals
Color is a physical property sometimes used to identify minerals
Malachite is always green and azurite is always blue
Ceramics - clay
Jewelry – gold or diamond
Cement - limestone,
clay and gypsum
Circuit boards –
gold
Stainless steel –
iron & chromium
Table salt - halite
Plaster cast - gypsum
Glass - quartz
Hob cleaners -illite (clay) w/ detergent
Tin can – cassiterite/tin
Emery board –
corondum & magnetite
Talcum powder & cosmetics - talc
Medicine & lotion -
Kaolinite (clay)
Computer chips - silicon
Non-stick pan - flourite
Light bulb filament – tungsten (from wolframite)
Photographic film –
silver salts
Lead in pencil –
clay & graphite
Rechargeable battery - nickel
https://en.wikipedia.org/wiki/Mineral
http://geology.com/minerals/
http://www.rocksforkids.com/RFK/identification.html
http://www.gemrock.net/content.asp?page=rocks-and-minerals
http://www.mineralogy4kids.org/properties.html
http://www.kidsloverocks.com/html/physical_properties_of_mineral.html
http://www.oum.ox.ac.uk/thezone/minerals/usage/
google.com image results
What are minerals?
Talc
Gypson, Soapstone and Calcite
Fluorite
Apatite and Feldspar
Quarts and Topaz
Corondum
Diamond
Streak
– color of finely powdered mineral
– tested by scratching the mineral with a white tile

Cleavage
– the plane where the crystals break
– along the weakest area of the mineral’s structure
– form thin layers (mica) or shape called rhombohedron (diamond)
Fracture
– If the mineral does not have a weak spot it breaks by itself (quartz and copper)
Luster
– the way light interacts with the surface of the mineral (adamantine-diamond, metallic-galena, greasy, silky, dull, pearly, waxy, or vitreous/glassy-quartz)
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Moh's scale
Fluorite has a range of colors.
Crystal Structure
– the flat faces of the crystal are of different shapes
Full transcript