Glitter is an assortment of small, reflective particles that come in a variety of shapes and colors. Glitter particles reflect light at different angles, causing the surface to sparkle or shimmer. Glitter is similar to confetti, sparkles, or sequins, but somewhat smaller.
Since prehistoric times, glitter has been made from many different materials including stones such as malachite, and mica, as well as insects and glass. Modern glitter is usually manufactured from plastic and is rarely recycled leading to calls from scientists for bans on plastic glitter.