Gemstone Origin Codes (SR, DR, AGG): Meaning & Identification

Question
SIR,
      The oc of any gemstone is either SR OR DR OR AGG.
     I want to know what is the full form of AGG.
  Secondly,by using 10x loupe only is it possible to identify
  wether a gemstone is SR OR DR OR AGG.If possible how can it be   done .

Answer
Good morning Joy,
    The full form of AGG (aggregate gemstone) is a stone which paterning is present with layers over iron oxide.   It is only possible to ID SR, DR, ADR, and AGG with a Polariscope rotating the stones 360 degrees to see the effects of light. A 10x loupe won't do this job for you. For more infomation see www.gemstonebuzz.com. Good luck.

Steve Kretser