what type of crystal/stone glows
1 glow in the dark paint (I used GlowAwayâ¢ washable glowing paint). 2  very hot water (I used my coffee maker). 3  borax, alum, epsom salts, sugar, salt, or use another crystal recipe. 4  food coloring (optional -- I used neon green coloring). 5  There are two ways to crack your eggs.