Scrying is a form of divination that uses refletive surfaces. When gazing into the surface you can recieve messages or images which you would then interpret. Some of the more popular forms of scrying uses water in a black bowl or black obsidian mirrors. Obsidian mirrors can be expensive and hard to come by, so it is very common to spray paint the glass of picture frames, like you see here. You can hang these on the wall, or use the stand that comes with the mirror to have it sit on your altar.
-Various sizes of simple black picture frames
-High gloss black spray paint