Aquamarine, the enchanting March birthstone, belongs to the esteemed Beryl species, a family of gemstones that also encompasses the illustrious Emerald and the delicate Morganite, along with other notable members such as Heliodor and Goshenite. Renowned for its stunning blue to blue-green hues, aquamarine captivates gemmologists and enthusiasts alike with its clarity and brilliance, making it a prized possession in both fine jewellery and gem collections. The accompanying image showcase a rough beryl system alongside two faceted cut aquamarines, illustrating the transformation from natural crystal to exquisite gem.
Aquamarine is typically formed in pegmatitic environments, where crystallised magma bodies cool slowly, allowing large crystals to develop. It can also form in metamorphic rocks under specific conditions. The primary source of colour in aquamarine is the presence of iron, with the specific oxidation state of iron influencing the stone’s hue. Typically, the most sought-after aquamarines exhibit a light to medium blue colour, reminiscent of tranquil ocean waters. This beautiful hue is aptly reflected in its name, derived from the Latin words “aqua” (water) and “marina” (of the sea).
As a member of the Beryl family, aquamarine shares its crystalline structure with other well-known gemstones. While emerald displays rich green hues due to chromium and vanadium, and morganite exhibits soft pinks attributed to manganese, aquamarine’s unique characteristics set it apart. It possesses a hexagonal crystal system, which contributes to its remarkable clarity and brilliance.
Aquamarine’s hardness on the Mohs scale is rated at 7.5 to 8, making it a durable choice for everyday wear, including rings and other jewellery. Its transparency and clarity are often exceptional, with high-quality specimens exhibiting no visible inclusions. This clarity, coupled with its enchanting colour, contributes to its desirability in the gem market.
Historically, aquamarine has been associated with the sea and maritime activities. Ancient sailors revered the stone as a talisman for protection and safe passage over turbulent waters. In addition to its nautical connections, aquamarine is believed to promote calmness, peace, and clarity of thought, making it a popular choice for meditation and healing.
In modern times, the March birthstone continues to hold significance within the realms of fashion and jewellery design. Its serene colour palette complements a wide variety of styles, from vintage to contemporary, making it a versatile choice for engagement rings and other fine jewellery pieces.
Brazil has long been the leading source of the March birthstone, with the state of Minas Gerais producing many of the finest crystals. Significant deposits are also mined in Pakistan, Madagascar, Nigeria, Mozambique and Zambia. Many aquamarines on the market are gently heat-treated to reduce green tones and bring out a purer blue, a stable and widely accepted practice.
Caring for a March birthstone is simple. Warm soapy water and a soft brush are all that is needed to keep the stone bright, and it should be stored separately from harder gems such as diamond and sapphire to avoid scratches. For further detail on grading and quality factors, the Gemological Institute of America publishes a comprehensive guide to aquamarine.
As gemmologists, understanding the nuances of aquamarine not only enhances our appreciation of this exquisite stone but also deepens our knowledge of the broader Beryl family. Its captivating beauty, geological formation, and rich history render the March birthstone a fascinating subject for study and admiration. Whether you are a seasoned gemmologist or a budding enthusiast, the allure of aquamarine is undeniable, inviting exploration and appreciation of the natural wonders that it embodies.
Garnet |
Amethyst |
Aquamarine |
Diamond |
Emerald |
Pearl |
Ruby |
Spinel |
Sapphire |
Opal |
Citrine |
Zircon |
