I have the opportunity to purchase a beautiful diamond 1.60 Ctw and it has nice color, very clear and looks perfect through a loop when looking down. The stone was cut wider too so it gives a very striking appearance. However, with the naked eye you can see two - what appears to be - small air bubbles in the middle of the diamond. Can these be something different - a natural mineral deposit or is it an indication that the diamond has been enhanced somehow. I will bring it to an appraiser if that makes sense but wanted to get some feedback first. Thanks.