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Minerals

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Minerals

  1. 1. MINERALSMINERALSÁngel Moreno Cañada. 1ºC.
  2. 2. What is a mineral ?A mineral is a A mineral is a naturally ocurring ,inorganic, solid which possesses a characteristic internal atomic structure and definite chemical compositionExamples of minerals
  3. 3. What is a rockA rock is a natural solid composed of multiplecrystals of one or more mineralsExamples of rocks
  4. 4. Colour:Is the first thing someone notices whenthey view a mineral.Lustre: is a description of the way light interactswith the surface of crystal.Cleavage: when a mineral breaks it does so eitherby fracturing or by cleaving.Hardness: a good property in mineralidentification the hardness.Streak: often demonstrates the true or inherenttheir color variable.The name of the propertys of minerals and thedescription of the property
  5. 5. Special terminology used to describe thispropertyColour: yellow, bronw, blue, red, gray, purple,orange...Lustre: crystal habit, index of refraction.Cleavage: good, distinct, cubic, octahedral,perfect.Hardness: weak, strong.Streak:milky, smoky pink, smoky.
  6. 6. This propertys in some minerals MINERAL:QUARTZ COLOUR:White, Purple, Pink , Smoky LUSTRE:Criptocrytolline,waxy can be vitreous CLEAVAGE:Is very weak (rhombohedral) HARDNESS: 7 STREAK:Is white INTERESTING:Silica for glass,Electicalcomponents,Optical lenses, Abrasives
  7. 7. This propertys in some minerals MINERAL:QUARTZ COLOUR:White, Purple, Pink , Smoky LUSTRE:Criptocrytolline,waxy can be vitreous CLEAVAGE:Is very weak (rhombohedral) HARDNESS: 7 STREAK:Is white INTERESTING:Silica for glass,Electicalcomponents,Optical lenses, Abrasives
  8. 8. This propertys in some minerals MINERAL:FELDESPAR COLOUR:WHITE , GRAY ,or colorless can bepale stades of other colors LUSTRE:Is vitreous to dull if weathered CLEAVAGE: Is perfect in one and gooddirection forming nearly right angled prism HARDNESS: 6- 6,5 STEAK:Is white INTERESTING: Only as mineral speciemc
  9. 9. This propertys in some minerals MINERAL:CAlCITE COLOUR:YELLOW,ORANGE,BLUE, PINK ,BRONW, GREEN, BLACK AND GRAY LUSTRE:Is vitreous to resinous to dull inmassive form CLEAVAGE:Is perfect in three directions,forming rhombohedrons HARDNESS: 3 STREAK: Is white INTERESTING: In cements and mortars
  10. 10. This propertys in some minerals MINERAL:HALITE COLOUR:Is clear or white but can be found Blue ,Purple , Pink, Yellow and Gray LUSTRE:Is vitreous CLEAVAGE: Is perfect in three directions formingcubes HARDNESS:2 STREAK:Is white INTERESTING: Major source of salt and as mineralspecimens
  11. 11. This propertys in some minerals MINERAL: MICAS COLOUR: Is White, Silver, Yellow, Green,Bronw LUSTRE: Is vitreous to pearly CLEAVAGE:Is perfect in one directionproducing thin sheets or flakes HARDNESS: 2- 2,5 STREAK: Is white INTERESTING: Heat and Electrical insultatorfor industrial purposeses

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