Glow in the Dark Heart Beads: You will receive 50 glow-in-the-dark heart pendants in 5 colors, 10 of each color, enough for daily use. Perfect for Valentine's Day DIY crafts, jewelry making. High Quality Materials: The heart pendants are made of glass and crystal. These pendants are not easily deformed or faded, and are light in weight, so they will not burden or discomfort your skin. They are the best choice for jewelry making. Tips for Glowing in the Dark: Expose these beads to sunlight or hold them up to bright light (even a flashlight) and they will absorb energy, which is then converted into fluorescence. Please note that the glowing effect may last for a few minutes and the brightness depends on the light source. Wide Range of Applications: These colorful heart-shaped glass ball ornaments have many possibilities, such as making necklaces, bracelets, earrings, keychain pendants and other craft projects, or hanging on your bag, pencil case to add more fun to your daily life. The Best Gift: Pendants can be given as gifts to people around you and those who like DIY on halloween, birthday, christmas, thanksgiving and other holidays. Make beautiful decorations for them and they will be surprised.