Why must you examine your gemstone loose?

 1) Before setting any gemstone, it is essential to inspect the stone in a loose condition. Why is this so important? When the time arrives to appraise that piece of jewellery, the stone weight cannot be accurately determined. 

2) When the diamond is in the ring, it is difficult for the 'certified appraiser' to find any abnormalities within the stone.  

3) What does the 'inspection process' entail? 

=> When the diamond is in a yellow ring, that COLOUR will be transferred directly into the gemstone.

=> When the diamond is already mounted, how can the appraisor judge the actual WEIGHT of the stone? There is no method to truly ascertain the exact weight.

=>For the absolute CLARITY & CUT, the stone must be inspected under a very strong microscope.

 Here is an actual appraisal found on the internet.

  I am not promoting this appraiser, only the description that they wrote. The remaining categories shown here are also important, but I wanted to keep this essay precise and brief.