Here is the super easy recipe for making sparkling homemade lavender bath salts.
2 cups of epsom salts
blue and red gel food coloring (just a few drops of each)*
1/8 tsp lavender essential oil
2 tsp iridescent glitter
*Purple gel food color can be used instead, but the slightly varying tones within the salts from using red and blue is a nice effect, especially in conjunction with the glitter.