Setting nemo folder emblems from the command line

First we need an emblem image file. For that any png can work. Just copy it to your ~/.icons folder (that you might wanna create if not found)

cp syncthing.png ~/.icons/emblem-syncthing.png

Then we will use gio to add the emblem to a directory

gio set -t stringv Documents/Bank  metadata::emblems "emblem-syncthing"