Beryl is a well-known and significant mineral belonging to the cyclosilicate group, with the chemical formula Be₃Al₂Si₆O₁₈. It crystallizes in the hexagonal crystal system and is widely recognized as the parent mineral of several important gemstones, including emerald (green), aquamarine (blue), morganite (pink), heliodor (yellow), and goshenite (colorless). Each variety gets its color from trace elements such as chromium, iron, or manganese. Beryl typically forms long, hexagonal prismatic crystals that can be transparent to opaque. Gem-quality beryl is usually transparent and exhibits a vitreous (glass-like) luster. The color range of beryl is extremely broad, including green, blue, yellow, pink, and colorless varieties. Among these, emerald and aquamarine are the most famous and valuable.