It is important to identify real emeralds and how to differ them from the fake ones. For the normal people, this can be done with the four C method but those who have the scientific prowess and an eye to go into the depth of the whole thing can use other methods which include absorption spectra, double refraction and also the refractive index. For beginners, the one thing which differ the emeralds from all the other beryl elements is the deep green color characteristic that is caused because of the chromium presence in the stone. Trained gemologists look for the color of the emerald first and tests are conducted to make sure it is a fake even when the color is slightly yellow green, simple green or even the characteristic emerald deep green.

Ditrichs_torch_emeraldThe density determination through the specific gravity indicates the ratio between the specific materials to the water weight. It is expressed in density and it is considered to be quite useful when finding out whether the gemstone is real or not.Emerald pendent Even with that, the professional gemologists go for optical procedures to make the final call on the emerald???s determination. This density can be calculated by placing the stone in beaker filled with dense liquid or heavy liquid. The specific gravity test makes sure that the judgment is done well and the result can be seen correctly on the basis that objects float in liquids with higher density, remain suspended in similar density liquids and sink in lower density liquids.

As the SG of the emerald is around 2.68, it would float in liquids with density around 3.20 while sink in those with densityEmerald ring lesser than 2.68. After that, the refractive index test can be done and in this one can check how the light refracts when it leaves from one medium and then enter into another one. The refraction amount for crystals is specific for individual gemstones and that can be helped to identify what type of stone it is.

A refractometer can be used for measuring the refraction. Here the user has to placeRefraction of emerald the gem facing downwards in the apparatus with some contact liquid that is used for testing of gems. If the stone has refractive index between 1.41 and 1.81 then it can be easily tested. The real emeralds are seen to have refractive number which varies from 1.56 to 1.59 and when this color is seen, the genuineness of the emerald can be easily seen.