Colored Stone SGL Report
SGL have equipped ourselves with the most technologically advanced equipment available for the use in the identification and authentication of colored gemstones. SGL Laboratories are equipped with immersion cells, micrometers, spectroscopes, polariscopes, refractometers, specific gravity liquids, binocular microscopes and spectrophotometers. Each SGL Colored Gemstone Certificate clearly states whether the stone is natural or synthetic. The certificate identifies the variety of the gemstone, its shape, carat weight, cut, color quality, measurements, transparency factor and major optical characteristics. If the stone has undergone any treatment, this information will be listed on the certificate as well. Upon request, the origin of the gemstone may be determined.
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SGL Labs diamond evaluation process is recognized throughout the industry and the world for its absolute precision. Diamonds are examined by four different gemologists, using the most advanced technology available.
It is essential for each diamond proprietor to know the credentials of their diamond in order to obtain confidence and assurance of the integrity of what they have acquired. An SGL Diamond or Gemstone Certificate is a statement issued by one of our independent gemological laboratories documenting the characteristics of the stone as determined by our experienced diamond graders at the time of evaluation.
Hearts and Arrows Diamonds are precision cut variations of the traditional 57 faceted round brilliant cut. They are cut to “ideal proportions” with superior optical symmetry and a specific faceting pattern. When all these factors are in harmony the result is a repeatable, near perfect pattern of eight symmetrical arrows in the face up position and eight symmetrical hearts when viewed in the table down position.
As you research diamonds, you may have seen information about lab created diamonds versus naturally formed diamonds. Some people may refer to lab created diamonds as “fake diamonds”, imitations or simulants, but this is incorrect. Lab created diamonds share the same or similar chemical and physical properties as a natural diamond produced by the geological processes of Mother Nature. However, because of the contrasting conditions of natural and lab grown formation, lab grown diamonds display several features which allow them to be gemologically distinguished from natural diamonds. On the other hand, cubic zirconia and moissanite—which can look like diamonds—have very different chemical and physical properties and are known as simulant diamonds.