Some are aglow with blossom, which clings to the gleaming splendour of newly born leaves. The bloom (a thin powdery surface coating) that cleaves (adheres or clings) to the newly formed leaves shines. The poet's description of the green bangles is accurate. They are made of glass or plastic and they glow in the sunlight. The word "bangle" comes from the Hindi word "bandhan", meaning "bracelet". Green color was originally used for clothing because it was believed that wearing colors opposite to one's skin tone would make you feel better about yourself. Today, people use colored glasses for a similar reason - it makes them feel more vital and alive. The green color of the glows is due to an optical effect called "iridescence". This means that when light falls on the bangle, it reflects back at different angles, producing a shimmering appearance. The angle at which the light hits the bracelet determines how much of the iridescent color is revealed. For example, if the light is shining straight down onto the bangle, only the first layer of glass will glow. If the light is hitting it at an angle, then both the layers will sparkle. People have been making jewelry out of glass for thousands of years. In ancient Egypt, pieces were carved from a single block of glass.