Hey M, I am using a combination of either an ANACS shipping box and or a Selfie ring box, I just set the phone on them, have it overhang, and click away.
I'm not really referring to blurryness but more like pixilation, may you need to turn the resolution up on your phone, I use a note ten and it really takes some nice shots, I also have a microscope app, this app is great, it actually allows me to capture the "LIBERTY" across the forehead of Liberty on a Barber Half.
Here is what I mean in your Photo