Aquamarine, with its captivating sea-blue hues, is a cherished gemstone known for its association with the calming energies of water. Chemically, it is a variety of beryl with the formula Be₃Al₂(SiO₃)₆, where its colour ranges from pale to deep blue due to trace amounts of iron. Known as the birthstone for March, aquamarine is believed to enhance clarity of thought and courage, often linked to the throat chakra, promoting communication and self-expression. On the Mohs scale of hardness, it ranks between 7.5 and 8, making it a durable choice for jewellery. Its serene beauty and reputed metaphysical properties make aquamarine a beloved gemstone for both collectors and spiritual enthusiasts alike.