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Minerals
What is a mineral? <ul><li>A mineral is a natural solid that was never living.  </li></ul><ul><li>Minerals are NOT rocks. ...
How can we identify minerals?
How can we identify minerals? <ul><li>From their properties: </li></ul><ul><li>Color </li></ul><ul><li>Streak </li></ul><u...
Color <ul><li>Many minerals come in different colors, or can even change color.  </li></ul><ul><li>Different colors of  qu...
Streak <ul><li>When a mineral is rubbed against something hard, a powder is left.  </li></ul><ul><li>A minerals streak wil...
Streak
Luster <ul><li>Minerals can reflect light.  </li></ul><ul><li>They way light reflects is called luster.  </li></ul><ul><li...
Cleavage <ul><li>Minerals break in different ways.  </li></ul><ul><li>A mineral that splits along a smooth, flat surface h...
Fracture <ul><li>Some minerals do not break along a flat surface.  </li></ul><ul><li>Fractured minerals look like rough cl...
Hardness <ul><li>Minerals have different hardness's. </li></ul><ul><li>Minerals are measured from 1 to 10 on Mohs’ hardnes...
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Earth Science: Identify minerals

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Notes from 10/14/10

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Transcript of "Earth Science: Identify minerals"

  1. 1. Minerals
  2. 2. What is a mineral? <ul><li>A mineral is a natural solid that was never living. </li></ul><ul><li>Minerals are NOT rocks. </li></ul><ul><li>Minerals are formed by pressure, temperature, and time. </li></ul>
  3. 3. How can we identify minerals?
  4. 4. How can we identify minerals? <ul><li>From their properties: </li></ul><ul><li>Color </li></ul><ul><li>Streak </li></ul><ul><li>Luster </li></ul><ul><li>Cleavage or Fracture </li></ul><ul><li>Hardness </li></ul>
  5. 5. Color <ul><li>Many minerals come in different colors, or can even change color. </li></ul><ul><li>Different colors of quartz </li></ul>
  6. 6. Streak <ul><li>When a mineral is rubbed against something hard, a powder is left. </li></ul><ul><li>A minerals streak will always have the same color. </li></ul>
  7. 7. Streak
  8. 8. Luster <ul><li>Minerals can reflect light. </li></ul><ul><li>They way light reflects is called luster. </li></ul><ul><li>Many shine like metal, metallic luster </li></ul><ul><li>Some minerals have a nonmetallic luster. </li></ul>
  9. 9. Cleavage <ul><li>Minerals break in different ways. </li></ul><ul><li>A mineral that splits along a smooth, flat surface has cleavage. </li></ul>Cubic (halite) Flat Sheets ( mica )
  10. 10. Fracture <ul><li>Some minerals do not break along a flat surface. </li></ul><ul><li>Fractured minerals look like rough clumps or curved pieces. </li></ul>Curved (olivine) (quartz)
  11. 11. Hardness <ul><li>Minerals have different hardness's. </li></ul><ul><li>Minerals are measured from 1 to 10 on Mohs’ hardness scale. </li></ul>
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