Aquamarine: March's Birthstone and the Gem of the Sea

Why Aquamarine Owns March

A gemstone curator's guide to aquamarine color grading, origin stories from Brazil to Madagascar, and how to buy a blue that won't disappoint.

Aquamarine is March's primary birthstone, and it earned that position through a combination of beauty, wearability, and sheer visual appeal that few gems can match. The name comes from the Latin aqua marina, meaning "water of the sea," and the best specimens capture exactly that quality: a clear, calm blue that looks like the ocean on a perfect day. When the American National Retail Jewelers Association revised the official birthstone list in 1952, they elevated aquamarine from its role as an alternative March stone to the primary position, replacing bloodstone. It was one of those rare cases where the committee got it exactly right.

As a member of the beryl mineral family, aquamarine is a geological sibling to emerald. That surprises a lot of people. The same mineral that produces the world's most famous green gem also produces this serene, transparent blue. I have been sourcing aquamarine at the Tucson and Las Vegas gem shows for over a decade, and what I look for has stayed consistent: clean material with a saturated blue that holds its color from every angle. When you find a stone that delivers that, you know it immediately. It draws attention from across a room.

Aquamarine in the Beryl Family

Beryl is one of the most versatile mineral families in the gem world, and understanding where aquamarine fits within it helps you appreciate what makes each variety unique. The beryl family includes emerald (green, colored by chromium and sometimes vanadium), morganite (pink, colored by manganese), heliodor (yellow, colored by iron), goshenite (colorless, the pure form), and aquamarine (blue, colored by trace amounts of iron in a different oxidation state than heliodor).

The chemistry is elegant. All beryl varieties share the same crystal structure: beryllium aluminum cyclosilicate. The only difference between a deep green emerald and a serene blue aquamarine is which trace elements ended up in the crystal lattice during formation. Iron in one state gives you blue. Chromium gives you green. Manganese gives you pink. Same architecture, completely different results.

What sets aquamarine apart from its more famous sibling emerald is clarity. Emerald is famous for its inclusions. Gemologists even have a special name for them: jardin, the French word for garden. Inclusions are so expected in emerald that they are essentially part of the gem's identity. Aquamarine, on the other hand, is naturally very clean. The same geological conditions that produce aquamarine tend to allow for slow, undisturbed crystal growth, which means fewer inclusions and exceptional transparency. According to GIA grading criteria, aquamarine is one of the few colored gemstones where eye-clean clarity is considered the trade standard rather than the exception. This clarity is one of aquamarine's greatest strengths as a jewelry stone. When light enters a well-cut aquamarine, it travels through the stone with almost no interruption, producing a brilliance and luminosity that makes the gem glow.

Where Aquamarine Comes From

Aquamarine is found on nearly every continent, but the quality and character of the material varies significantly by source. Understanding origins helps you evaluate what you are buying, because provenance can tell you a lot about what to expect from a stone.

Brazil is the dominant source and has been for decades. The state of Minas Gerais produces the vast majority of gem-quality aquamarine, and the famous Santa Maria mine in that region produced what many consider the benchmark for the finest aquamarine blue. "Santa Maria" has become a color grade as much as a locality name. When a dealer says "Santa Maria blue," they are describing a medium-to-deep, slightly saturated blue with no green, regardless of whether the stone actually came from that specific mine. Brazilian aquamarine set the standard, and the best material from this country remains the reference point for quality.

Pakistan produces exceptional aquamarine from the Shigar Valley in the Karakoram Range. Pakistani stones can rival the best Brazilian material in color, and they sometimes come in large, well-formed crystals that are prized by collectors. The terrain is difficult, which limits production, but the quality at the top end is outstanding.

Madagascar has become an increasingly important source, producing aquamarine with good color and clarity. Nigeria and Mozambique contribute steady supplies of commercial-grade material, with occasional fine pieces. Afghanistan produces beautiful specimens from the Panjshir Valley, though political instability has made supply unpredictable.

In the United States, Mount Antero in Colorado is the most famous domestic source. At over 14,000 feet elevation, it is one of the highest gem-producing localities in North America. The aquamarine from Mount Antero tends to be pale but clean, and it holds a special place in American mineral collecting. You will occasionally see it at shows, prized more as a collector's specimen than as faceting material.

Aquamarine Color and What to Look For

Color is the single most important factor in aquamarine value, and the range is wider than many people expect. Aquamarine runs from nearly colorless pale blue through medium blue to a deep, saturated blue, with varying amounts of green influence. Understanding this spectrum is essential if you are shopping for quality.

The most valued color is a medium-to-deep blue with moderate saturation and minimal green. This is the "Santa Maria blue" I mentioned earlier. It is a pure, decisive blue that reads clearly even in smaller stones. Stones with this color command significant premiums, sometimes ten times or more the price of pale material of the same size and clarity.

Most aquamarine on the market has been heat-treated to reduce green tones and enhance the pure blue. This is one of the most universally accepted treatments in the gem trade. The process involves heating the rough material to approximately 400-450 degrees Celsius, which changes the iron's oxidation state and shifts the color from blue-green toward pure blue. The treatment is permanent, stable, and essentially undetectable. It does not affect the stone's durability or structure. The gem trade considers this a standard enhancement, and it should not reduce your confidence in the stone. Untreated aquamarine with fine blue color does exist, but it is rare and commands a premium among collectors.

Very pale aquamarine is abundant and affordable. If you see an aquamarine ring priced at fifty dollars, it is almost certainly very light material. There is nothing wrong with pale aquamarine. It has a lovely, icy quality that works beautifully in larger pieces. The International Gem Society notes that color saturation is the primary value driver for aquamarine, far more than carat weight or clarity. If you want the color that makes people stop and ask "what stone is that?", you need to look at stones with enough saturation to hold their blue in any lighting condition.

Evaluating Aquamarine Quality

Aquamarine is evaluated using the same fundamental criteria as other colored gemstones: color, clarity, cut, and carat weight. But the way these factors play out in aquamarine is distinct from other gems, and knowing the specifics will help you make smarter buying decisions.

Color is the most important factor, as I described above. Look for a medium blue without excessive green. The stone should show its color clearly, not look washed out or gray. In person, rotate the stone and look at it from multiple angles. Aquamarine is pleochroic, meaning it shows different color intensities depending on the viewing direction. A skilled cutter orients the stone to show the deepest blue through the table facet.

Clarity should be excellent. Because aquamarine is naturally a very clean gem, the market expects eye-clean stones. Inclusions that would be perfectly acceptable in emerald are not tolerated in aquamarine. If someone is selling you an included aquamarine at a premium, walk away. Clean material is readily available, and there is no reason to accept visible inclusions in this gem.

Cut matters significantly in aquamarine because the gem's color is often light, and a well-executed cut can maximize color saturation. Emerald cuts (rectangular step cuts) and ovals are the classic shapes for aquamarine, and for good reason. These shapes create broad, open facet patterns that showcase the color beautifully. You will also see aquamarine in pear, cushion, and round brilliant cuts. The key is that the stone should be lively, returning light evenly without dark or washed-out zones.

Carat weight is where aquamarine offers a genuine advantage over other blue gems. Unlike sapphire, where the per-carat price escalates dramatically with size, aquamarine is available in large sizes at relatively accessible price points. A 10-carat aquamarine with good color is impressive but not uncommon. A 10-carat sapphire with comparable color would cost exponentially more. This means aquamarine gives you the ability to own a genuinely large, eye-catching blue gem without the price tag that comes with the rarer blue stones.

Aquamarine has a Mohs hardness of 7.5 to 8, which makes it excellent for all types of jewelry, including rings for everyday wear. It has no cleavage concerns that affect durability in normal wear, and it is not sensitive to light or chemicals in any practical way. This is a tough, practical gemstone.

Aquamarine Pricing Tiers Per Carat

Aquamarine pricing follows the color logic above closely. The same size stone can sell for $50 or $5,000 per carat depending on saturation and origin. Use these three tiers as your reference when you are comparing offers.

If you want to see how these tiers translate to finished pieces, my curated aquamarine collection spans pendants from $165 to settings near $4,700, with most rings landing between $439 and $1,485 and necklaces between $450 and $3,000. Many of the strand and pendant pieces use Santa Maria color material I sourced personally at Tucson Gem Shows and JCK Las Vegas.

Aquamarine Style Archetypes in the Ulka Rocks Collection

Live inventory falls into three clear archetypes. Use this as your shortcut for matching budget and use case to the right piece.

If you would like help matching your budget to one of these tiers, I run a personal sourcing service for collectors. You can browse the aquamarine collection first to see live inventory and current pricing.

How Aquamarine Replaced Bloodstone

The story of how aquamarine became March's primary birthstone is a story about changing tastes and the evolution of jewelry design. In 1912, when the American National Association of Jewelers published the first standardized birthstone list, bloodstone was designated as March's primary stone, with aquamarine listed as an alternative. Bloodstone is a dark green chalcedony flecked with red spots of iron oxide. It has a long history and deep symbolism, but it is an opaque stone with a very specific, somewhat somber aesthetic.

By the mid-twentieth century, jewelry design had shifted dramatically. The Art Deco era and the post-war period brought a preference for transparent, faceted gems in lighter settings. White gold and platinum replaced the heavy gold settings of the Victorian and Edwardian eras. Jewelry became more delicate, more focused on brilliance and light. In this context, bloodstone, with its dark opacity, felt increasingly dated. Aquamarine, with its transparent blue, its ability to take beautiful faceted cuts, and its compatibility with the modern preference for bright, wearable color, was the obvious choice.

The 1952 revision formally elevated aquamarine to primary status for March. Bloodstone did not disappear entirely. It remains recognized as an alternative March birthstone, and it retains a devoted following among collectors who appreciate its history and symbolism. If you want to learn more about this fascinating stone, read our bloodstone guide. And for a broader look at how all the birthstones were assigned and revised, explore our history of birthstones page.

Famous Aquamarines

Aquamarine has produced some of the most spectacular individual gemstones in history, and these famous pieces demonstrate something important about the gem: it performs brilliantly in very large sizes, maintaining its clarity and color even at weights that would be unthinkable for most other precious stones.

The Dom Pedro Aquamarine is the largest faceted aquamarine in the world, weighing 10,363 carats (approximately 4.6 pounds). It was cut by the renowned German gem artist Bernd Munsteiner from a crystal originally found in Minas Gerais, Brazil, in the 1980s. Munsteiner used his signature fantasy cut technique, carving intricate negative-relief channels into the back of the stone that create an internal starburst of light. The Dom Pedro now resides in the Smithsonian Institution's National Museum of Natural History, where it is one of the most visited gem displays. It stands as proof that aquamarine can be both massive and mesmerizing.

Queen Elizabeth II's Brazilian Aquamarine Tiara began as a necklace and earring set given to the young queen by the president and people of Brazil as a coronation gift in 1953. The set featured large, emerald-cut aquamarines of exceptional quality. The queen loved the stones so much that she later commissioned a tiara to match, adding additional aquamarines acquired over the years. The suite became one of her most recognizable jewelry collections, regularly worn at state events, and demonstrated how aquamarine holds its own alongside diamonds in the most formal settings imaginable.

The Roosevelt Aquamarine is a 1,298-carat rectangular step-cut stone that was given to First Lady Eleanor Roosevelt by the Brazilian government in 1936. The stone was cut from a massive crystal found in Minas Gerais and remains one of the finest large aquamarines ever produced. It is now part of the Franklin D. Roosevelt Presidential Library collection.

These pieces share a common theme: aquamarine's ability to deliver extraordinary clarity and color at sizes where most other gemstones would be impossible to find, prohibitively expensive, or heavily included. It is a gem that scales beautifully.

Styling Aquamarine Jewelry

Aquamarine is one of the most versatile colored gemstones when it comes to styling, and its cool blue works in a wider range of settings and combinations than you might initially expect.

The gem's blue pairs naturally with white metals. White gold, platinum, and sterling silver all create a clean, monochromatic cool palette that lets the aquamarine's color take center stage. This is the classic approach, and it works beautifully for engagement rings, pendants, and earrings. But do not overlook yellow gold. The warm-cool contrast of aquamarine set in yellow gold creates a richness and visual interest that feels both modern and timeless. Rose gold offers a similar complementary warmth with a slightly more contemporary feel.

Aquamarine's hardness of 7.5 to 8 makes it an excellent choice for rings, including daily-wear pieces. It sits comfortably between the hardness of quartz (7) and sapphire (9), which means it resists scratching well in normal wear. This durability, combined with its lack of cleavage concerns, makes it one of the most practical colored gemstone options for engagement rings and everyday statement rings.

For building a collection, aquamarine layers beautifully with other blue-toned gems. Pair it with sapphire for depth, with tanzanite for a violet-blue contrast, or with blue topaz for an affordable tonal collection. Aquamarine also complements diamonds, white sapphires, and moonstones in mixed-gem designs. Its transparency and brilliance mean it holds its own alongside high-refractive-index stones without looking dull or flat.

The gem transitions effortlessly from casual to formal. A simple aquamarine pendant on a chain works with a t-shirt. The same stone set in a diamond-accented pendant works with an evening gown. That versatility is rare in colored gemstones and is one of the reasons aquamarine has maintained its popularity across changing fashion trends for decades. For more styling inspiration and specific outfit pairings, read our aquamarine styling guide.

Caring for Aquamarine

Aquamarine is one of the easiest gemstones to care for, which is fitting given how wearable it is. With a Mohs hardness of 7.5 to 8, it resists scratching from most everyday materials and can handle the bumps and contact of normal wear without concern.

For cleaning, warm soapy water and a soft brush are all you need. A few drops of mild dish soap in warm water, a gentle scrub with a soft toothbrush to remove any buildup around the setting, and a rinse under clean water will keep your aquamarine looking its best. Dry with a soft, lint-free cloth.

Ultrasonic cleaners are generally safe for aquamarine. The gem does not contain the types of inclusions or fracture fills that make ultrasonic cleaning risky for stones like emerald. However, if your piece has delicate prong work or pave-set accent stones, use caution with any mechanical cleaning method to protect the setting rather than the stone itself.

Steam cleaners are also generally safe for aquamarine. The stone is not heat-sensitive in the way that opals, pearls, or tanzanite can be. The heat treatment that most aquamarine undergoes during processing occurs at temperatures far higher than any steam cleaner produces, so there is no risk of color change from normal cleaning.

There are no special sensitivities to worry about. Aquamarine is not affected by light exposure, household chemicals, or perfumes in any meaningful way. You do not need to remove an aquamarine ring before washing dishes or applying hand cream. This is a gemstone that fits easily into a busy life, and that practical durability is one of the reasons it works so well as a birthstone jewelry choice.

Store your aquamarine jewelry separately from harder stones like sapphire and diamond, which can scratch it. A soft pouch or separate compartment in a jewelry box is sufficient. Beyond that, enjoy wearing it. It is built for it.