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GIA Diamonds

Diamond CertificationEach diamond has a special grading report, which lists the characteristics of the precious stone. The Gemmological Institute of America (GIA) is one of the most respected organisations in the industry, which issues these reports and certifies the diamonds.

GIA-Certified Diamonds At La Vivion

The diamonds available at La Vivion have grading reports issued by the GIA and are conflict-free. The organisation and its certification has set a standard for diamond grading and identification. What is more, the GIA’s grading system serves as the industry’s benchmark credentials, and it is widely recognised by the international industry of gems and jewellery.

The diamond characteristics documented in the diamond grading report include:

  • Shape and cutting style.
  • Measurement in millimetres.
  • Carat weight listed to the nearest hundredth of a carat.
  • Colour grade.
  • Clarity grade is included under a magnification of 10x
  • Cut grade is determined from the face up appearance of the diamond. Its design and craftsmanship is also listed. Round diamond cut grades are available for diamonds, which were graded after January 1, 2006.
  • The finish of the diamond’s surface and facet placement is also graded.
  • Polish is rated taking into consideration the smoothness of the stone’s surface.
  • Symmetry is graded by measuring the shape, placement and alignment of the facets in relation to one another. The outline is also graded.
  • Fluorescence is graded by exposing the diamond to ultraviolet rays. The strength of colour displayed under this lighting is assessed.
  • Additional comments are listed for features not listed in the report.
  • Clarity plot- this is a map that displays the approximate type, size and location of inclusions, when the diamond is viewed under a microscope.
  • Proportion diagram- this is a map of the stone’s proportions.

What Is In A Diamond’s Proportion Diagram?

The proportion diagram of a diamond includes more information about the following characteristics:

  • Depth – the height of the stone, measured from the diamond’s culet to the table.
  • Table – located at the top of the gemstone, and is the largest facet.
  • Culet – the appearance of a culet or its absence is graded in the report.
  • The girdle and its thickness are also listed.

All these characteristics must be present on the grading report of the precious stone. Here at La Vivion you can find a wide collection of diamonds which have all been GIA-certified. If you require additional details on a particular diamond, feel free to contact us and we will be happy to answer any additional questions.
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