Howdy, I found this shield about 6 inch's deep. I have no clue what it is , it was buried next to an old boot. I thought it was aluminum but, when I got back home it seem to heavy, so I started rubbing and then polished it some and found in the upper right side the numbers 925 and some letters that are hard to make out. My friend says its silver thats a cool find. nothing on the back of it, just plain.. MY QUESTION to anyone is why are the two silver dimes that I found in the same area more shiny looking and the 925 silver was black ? Sorry about the picture quality . Thanks for looking and good luck digging....