For those born on March 18th, the designated birthstone is Aquamarine, a gemstone that has captivated jewelers, gemologists, and collectors for centuries. Known for its ethereal blue hues, Aquamarine is more than just a decorative gemstone—it carries a rich history of symbolism, metaphysical properties, and cultural significance. This article provides a comprehensive overview of Aquamarine, covering its geological properties, historical use, spiritual meanings, and practical considerations for care and preservation. Whether you are a gemstone enthusiast, a jewelry buyer, or simply curious about the significance of birthstones, this guide offers an in-depth exploration of the March 18th birthstone.
History and Lore
Aquamarine has long been associated with the sea, and its name, derived from the Latin aqua marina (meaning “water of the sea”), reflects this connection. Ancient civilizations, including the Egyptians and Romans, revered the gemstone not only for its beauty but also for its perceived magical properties. During the Roman Empire, sailors often carried Aquamarine as a talisman to ensure safe passage across the oceans. They believed the gemstone could calm turbulent waters and protect them from the perils of the sea.
The gemstone’s association with the sea continued into the Middle Ages and beyond. In medieval Europe, Aquamarine was believed to have the power to ward off poison and was often worn by travelers as a protective amulet. It was also thought to bring clarity of thought and serenity to its wearer, making it a popular choice for those seeking emotional balance and inner peace.
In addition to its maritime associations, Aquamarine has been valued for its supposed healing properties. Historical records suggest that it was used in ancient times to treat ailments of the throat and voice, and it was believed to aid in communication and self-expression. These attributes made it a favored gemstone among poets, orators, and public speakers.
Aquamarine also carries a place in the annals of royal and aristocratic jewelry. One of the most notable examples is the 1,298-carat aquamarine gifted to First Lady Eleanor Roosevelt in 1936 by the government of Brazil. This impressive gemstone, cut in a rectangular step cut, is a testament to the gem’s enduring appeal and prestige.
Geological Formation and Sources
Aquamarine is a member of the beryl family, a mineral group that also includes emerald and morganite. Its blue coloration is due to trace amounts of iron within the crystal structure. The gemstone typically forms in granitic pegmatites—coarse-grained igneous rocks that develop from the slow cooling of magma. These conditions allow for the growth of large, well-formed crystals, which can often be found in their natural state before being cut and polished.
The finest Aquamarine specimens are typically found in Brazil, which is the leading producer of the gemstone. Brazilian deposits in the states of Minas Gerais, Bahia, and Mato Grosso are particularly renowned for their high-quality stones. Other notable sources include Nigeria, Madagascar, Kenya, Pakistan, and the United States. Each location produces Aquamarine with slightly different coloration and clarity, but the Brazilian stones are generally considered the most desirable due to their vibrant blue tones and high transparency.
Aquamarine is typically found in its natural form as a hexagonal prism with pyramidal terminations. It is often free from inclusions, giving it a clarity similar to that of water, which further enhances its beauty. The gemstone is also known for its hardness—ranging from 7.5 to 8 on the Mohs scale—which makes it durable and suitable for a wide range of jewelry applications.
Gemological Properties
Aquamarine is a relatively stable gemstone with a number of distinct gemological properties that contribute to its desirability. Here is a summary of its key characteristics:
- Chemical Formula: Beryllium aluminum silicate (Be₃Al₂(SiO₃)₆)
- Hardness: 7.5–8 on the Mohs scale
- Refractive Index: 1.56–1.60
- Specific Gravity: 2.67–2.83
- Color: Ranges from pale blue to deep blue, with some greenish undertones
- Luster: Vitreous (glassy)
- Transparency: Transparent to translucent
- Crystal System: Hexagonal
- Cleavage: Perfect in one direction
- Common Cuts: Faceted (round, oval, emerald), cabochon (less common)
The gemstone’s clarity is generally excellent, as it is rare to find inclusions that significantly affect its appearance. However, when inclusions are present, they are often small and not visually distracting. The absence of cleavage in most Aquamarine specimens makes it a relatively durable gemstone, suitable for everyday wear.
Aquamarine’s refractive index gives it a moderate brilliance, and its color is one of its most defining features. The blue tones are often described as resembling the sea or sky, and the intensity of the color can vary depending on the concentration of iron within the crystal. The most valuable Aquamarine stones are those with a deep, saturated blue and high clarity.
Symbolism and Metaphysical Beliefs
Throughout history, Aquamarine has been associated with a number of symbolic and metaphysical properties. In ancient times, it was believed to promote peace, courage, and protection—especially for sailors who carried it as a talisman. These beliefs have persisted into modern times, with many people still attributing calming and protective qualities to the gemstone.
One of the most common metaphysical associations with Aquamarine is its role in promoting emotional and mental balance. It is often used in crystal healing to soothe anxiety, reduce stress, and enhance clarity of thought. Those who wear Aquamarine are believed to experience a greater sense of inner peace and confidence, making it a popular choice for individuals seeking emotional stability.
Aquamarine is also linked to communication and self-expression. It is said to help those who struggle with public speaking or expressing their thoughts clearly. This property makes it a favored gemstone among writers, orators, and anyone who values the power of words.
In addition to its emotional and communicative properties, Aquamarine is believed to have a calming effect on the physical body. It is associated with the throat and thyroid glands, and is often used in alternative medicine to support these areas. Some believe it can also aid in the treatment of respiratory conditions and promote overall physical well-being.
In the realm of spirituality, Aquamarine is considered a stone of spiritual awakening and connection. It is believed to enhance one’s ability to listen to the subtle messages of the universe and to access higher states of consciousness. This makes it a popular gemstone for meditation and spiritual practices.
Care and Cleaning
Due to its relatively high hardness and durability, Aquamarine is a gemstone that can be worn and cared for with ease. However, there are a few precautions that should be taken to ensure the longevity of Aquamarine jewelry.
First, it is important to avoid exposing Aquamarine to harsh chemicals, as these can damage the gemstone’s surface and affect its clarity. This includes household cleaning agents, perfumes, and cosmetics. When cleaning Aquamarine jewelry, it is best to use a mild soap solution and a soft cloth or brush. Ultrasonic cleaners can also be used, but it is important to check the setting of the gemstone to ensure that it is secure and that there are no inclusions that could be affected by the vibrations.
Aquamarine should also be stored separately from other gemstones to prevent scratches or damage. A soft pouch or a lined jewelry box is ideal for keeping Aquamarine jewelry safe when not in use.
Because Aquamarine has a perfect cleavage in one direction, it is important to handle it with care to avoid any impact that could cause it to chip or break. This is especially important for Aquamarine set in jewelry that is worn frequently, such as rings or earrings.
Conclusion
Aquamarine, the birthstone for those born on March 18th, is a gemstone of remarkable beauty and enduring significance. From its association with the sea and its calming blue hues to its rich history of symbolism and metaphysical properties, Aquamarine has captivated people for centuries. Whether worn as a piece of jewelry or used in crystal healing, it continues to be a source of inspiration and wonder.
Its geological properties make it a durable and versatile gemstone, suitable for a wide range of jewelry designs. Its cultural and spiritual significance, combined with its aesthetic appeal, ensures that Aquamarine remains a cherished gemstone for both collectors and wearers alike.
For those born on March 18th, Aquamarine is more than just a birthstone—it is a symbol of serenity, courage, and protection. As a gemstone that bridges the past and the present, it continues to hold a special place in the world of gemology and jewelry.