Hello everyone, I started collecting coins in 2016 primarily new pf70 silver eagles, gold eagles, and gold buffalos. I quickly realized multiple 2016, 2017 pf70 silver eagles graded by NGC developed Milk spots and since have stopped buying silver coins out of frustration. Now looking at some coins I purchased my 2017 NGC PF70 1oz Gold eagle appears to have a small what appears to be a milk spot. Unfortunately do not have any magnification right now to look closer but to my eye it is not something in the holder. Is this common or possible? My Buffalos are fine but given the different purity level to an eagle not sure if it’s possible. All info is appreciated.