Symmetry in diamond - PowerPoint PPT Presentation

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Symmetry in diamond

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Diamond symmetry means how symmetrical overall shape and cuts of diamond. There are some requirements for a diamond to be certified in gemological laboratories. – PowerPoint PPT presentation

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Title: Symmetry in diamond


1
A Symmetry in Diamond
2
What is Symmetry in Diamond?
  • Research of table, culet, girdle, facet, pavilion
    in diamond.
  • Check for alignment of cuts.
  • When You purchase a Certified diamond you will
    get certification report of it.
  • Poor symmetry diamond may not good for jewelry.

3
Defects of Diamonds
  • It is possibility that a diamond can have
    following defects in it, Which affects its
    quality and genuineness.
  • Off-center table
  • Misshapen facets
  • Out-of-round girdle outline
  • Off-center culet
  • Wavy girdle
  • Crown Pavilion misalignment

4
Grade ofSymmetry
  • For diamond grading , A light is passed from top
    of it. If light straight reflect to eye then it
    is very good symmetry diamond.
  • Misplacing in diamond shaping, creates light
    skipping.
  • Diamond certification laboratory check for these
    several defects to grade a diamond to one of
     Excellent, Very Good, Good, Fair, and
    Poor Symmetry .

5
Excellent Symmetry
  • Excellent symmetry diamond means not any
    misplacement.
  • Reflects Light in straight 4 times more when
    passed in it.
  • Rare to find.

6
Very Good Symmetry
  • Reflects light from other side of top.
  • Contains a very slight misalignment which is not
    recognizable.
  • Low reflection compared to EXCELLENT
  • Useful for low cost purchase.

7
Good Symmetry
  • Contains few misalignments.
  • Low reflection than Excellent, Very Good,
    Diamonds.
  • Costs less.
  • May Contain missing facet.

8
Fair Symmetry
  • 80 of people dont choose this grade symmetry.
  • We can see some Misplacement by naked eye.
  • Light reflection is not proper and can skip also.

9
Poor Symmetry
  • Thick Girdle, Light could not enter into diamond.
  • Light skips in unwanted manner.
  • Lots of defects, misalignments.
  • Not recommended.

10
For More
  • https//www.ourosjewels.com/blogs/topic/diamond-sy
    mmetry
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