diamond appraisal

Growth Mark - Surface indication of possible x+1 (chrystal) faces.

  • OCTAHEDRAL faces <TRIGONS>
  • Triangular depression

     

    • DODECAHEDRAL faces <GROOVES>

    Parallel linear depression

     

    • CUBIC FACES

    Square/ or Rectangular depression.

     


     

    CRYSTAL PROPERTIES

       

    -HARDNESS => Resisitance to scratching.

     

    Diamond is 10 on MOHS scale. Diamond has directional hardness.

    A) Hardest - octahedral planes

    <150x>

     

    B) Softest - DODECAHEDRAL PLANES.

    (4X)

     

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    - Cleavage - Smooth plane, or break along as plane of atomic weekness.

    <OCTAHEDRAL PLANES>

     

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    - Specific Gravity - weight of substance compared to an equal volume of water

     

    1 gram          pen in air                                      weight in air 1 gram

    .4 gram        pen in water  FORMULA                weight in water .4gram

     

    ***[3.52]*** Specific Gravity 

     

    is the diamonds (S)(G) 3.52

     

    Fun TIP: Diamond is heavier in air