Naturally occurring Inorganic Solid Crystalline structure Specific physical and chemical properties.
Minerals and Mineral Identification By Mr. King. What is a mineral? Inorganic Inorganic Naturally...
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Transcript of Minerals and Mineral Identification By Mr. King. What is a mineral? Inorganic Inorganic Naturally...
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Minerals and Minerals and Mineral Mineral
IdentificationIdentificationBy Mr. KingBy Mr. King
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WhatWhat is a mineral?is a mineral?
•InorganicInorganic
•Naturally occurring Naturally occurring
•Crystalline structureCrystalline structure
•Chemical compositionChemical composition
•Distinct physical propertiesDistinct physical properties
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Mineral propertiesMineral properties•ColorColor
•LusterLuster
•Habit (Shape)Habit (Shape)
•Cleavage & FractureCleavage & Fracture
•StreakStreak
•HardnessHardness
•OtherOther
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Color:Color: Not mineral Not mineral specificspecific
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Luster:Luster:How minerals reflect lightHow minerals reflect light
Non-metallic
Metallic
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Mineral Habit Mineral Habit (Shape)(Shape)
Shape a Shape a mineral takes mineral takes if grown if grown unimpededunimpeded
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CleavageCleavage
Cleavage is the breakage Cleavage is the breakage along planes that cut across along planes that cut across weak bonds, thus cleavage weak bonds, thus cleavage in controlled by the in controlled by the mineral’s atomic structuremineral’s atomic structureEG: rhombohedral calciteEG: rhombohedral calcite
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FractureFracture
Fractures occur in minerals Fractures occur in minerals whose bond strengths are the whose bond strengths are the same in all directions thus same in all directions thus breakage doesn’t follow a breakage doesn’t follow a crystallographic direction, but crystallographic direction, but follows an irregular surface.follows an irregular surface.
EG: conchodial fracture in EG: conchodial fracture in quartzquartz
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CleavageCleavage
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There is a visual difference There is a visual difference between the cleavage and between the cleavage and fracture in a mineral ... Just fracture in a mineral ... Just
waitwait
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Streak:Streak:
The powdered form of a mineralThe powdered form of a mineral
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Other PropertiesOther Properties•Specific Specific
gravitygravity•Reaction to Reaction to
acidacid•StriationsStriations•MagnetismMagnetism•FluorescenceFluorescence
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