Wrap the center of the jar with a strip of masking tape. Be sure to press all the edges down, particularly around the raised letters on the jar, if there are any.
Use the paintbrush to apply Mod Podge or glue to the bottom section of the jar, overlapping the masking tape a little to be sure you get adequate coverage. Place hand inside jar and hold over a paper plate, sprinkling glitter onto glued area, turning with your hand and wrist. Continue until all glue is covered. Repeat this with the top section of the jar, but not the rim. Gently tap off the excess glitter onto the plate. Let this dry for at least an hour.
Carefully remove the tape from the center of the jar. Paint the center of the jar with Mod Podge or glue and sprinkle with black glitter. Gently tap off excess glitter. Let dry for about 30 minutes.
To add the buckle, pipe glue onto the black glitter, carefully spreading to the width you want using a paintbrush. Sprinkle with gold glitter and tap off excess.
Use a paintbrush to add glue or Mod Podge to the rim of the jar. Sprinkle with white glitter and tap off excess.