March Birthstone Rings: The Complete Aquamarine Engagement Guide

March is one of only a few months with two birthstones — aquamarine and bloodstone — and aquamarine is by far the more beloved of the pair: luminous, durable, and historically connected to Princess Diana and to centuries of engagement tradition. Are March birthstone rings good for engagements? Yes — aquamarine engagement rings are among the most practical and visually distinctive choices in the alternative gemstone market, combining Mohs 7.5–8 hardness with a color that is genuinely unlike any other stone available at the same price point. The pale blue-green of aquamarine reads differently in every light and on every skin tone, and it carries the personal weight of a birthstone without looking like a novelty.

Browse the pieces as you read in our March birthstone jewelry collection, or go straight to aquamarine engagement rings. For the wider context of the month, see GIA's March birthstones overview and the American Gem Society guide.

Which Aquamarine Engagement Ring Style Is Best?

1. Emerald cut aquamarine — the most iconic aquamarine cut; long, clean facets maximize the stone's glassy clarity and create an Art Deco aesthetic. See our aquamarine rings.
2. Oval aquamarine solitaire — the most versatile; elongates the finger, maximizes face-up size, and suits both minimal and elaborate settings. Browse solitaire engagement rings.
3. Vintage halo aquamarine — amplifies the stone's presence and adds diamond sparkle around the soft blue center, creating a bridal-weight ring that works across aesthetics. Browse halo engagement rings.

What Is Aquamarine — The Geology Behind the Color

A variety of beryl, colored sea-blue by iron — the March birthstone up close.

Aquamarine is a variety of beryl — beryllium aluminum silicate, Be₃Al₂Si₆O₁₈, the same mineral family as emerald and morganite — distinguished by its pale blue to blue-green color. The name comes from the Latin aqua marina, meaning sea water, and the name is accurate: a fine aquamarine held under daylight genuinely resembles the color of clear tropical water over white sand, with a glassy transparency and an internal luminescence that few other stones at its price point can approach.

The color comes from iron impurities within the beryl crystal structure — specifically Fe²⁺ ions in the crystal lattice. This is a common misconception to correct: many buyers assume aquamarine's blue is related to copper, as in turquoise or larimar. It is not. The iron content and its oxidation state determine both the intensity and the exact hue of the blue — stones with a higher Fe²⁺ concentration appear more deeply saturated, while stones with mixed Fe²⁺ and Fe³⁺ show a greenish or yellowish component that heat treatment reduces.

The majority of gem-quality aquamarine comes from Brazil — particularly from the state of Minas Gerais, where some of the world's finest and most saturated specimens have been mined since the 18th century. Notable sources also include Pakistan (the Karakoram mountains), Nigeria, Zambia, Mozambique, and Madagascar. The famous "Santa Maria" designation refers to aquamarine from the Santa Maria de Itabira mine in Brazil, known for an intense, saturated blue that commands premium pricing. Pakistan's aquamarine, from the Shigar Valley, tends toward a deeper blue-green and is prized by collectors for its distinctive tonal depth.

Aquamarine also grows to extraordinary sizes: the largest cut aquamarine in the world, the Dom Pedro, is a 10,363-carat obelisk — about 14 inches tall — cut by the German lapidary artist Bernd Munsteiner from a crystal mined in Brazil in the late 1980s and now permanently displayed at the Smithsonian's National Museum of Natural History alongside the Hope Diamond. Its sea-blue clarity at that scale is a vivid illustration of why aquamarine has fascinated collectors and jewelers for centuries.

Aquamarine and emerald are both beryl — the same mineral, the same crystal structure, very similar Mohs hardness (7.5–8). But their daily wear durability is radically different. Emerald contains abundant liquid-filled inclusions called jardin (French for garden) that create internal fracture planes throughout the stone. A sharp lateral impact can propagate along these planes and fracture the stone regardless of its hardness. Aquamarine is typically eye-clean with minimal inclusions — its internal structure is far more homogeneous, meaning it resists fracture much more effectively than emerald at the same Mohs rating. For buyers who love the idea of a green stone but find emerald's fragility concerning, tsavorite garnet (Mohs 7–7.5) offers a strong alternative; for blue-green, aquamarine is unrivaled at its price point. See our gemstone engagement rings and the complete blue gemstones guide.

Bloodstone and Why March Has Two Birthstones

The older March stone — and how aquamarine came to share the month.

March is one of a small group of months assigned two official birthstones, and the two could hardly be more different. Aquamarine is transparent, cool, and sea-blue. Bloodstone — the other March birthstone — is opaque, earthy, and dramatic: a dark green variety of chalcedony (cryptocrystalline quartz, in the jasper family) flecked with vivid red spots of iron oxide that look like drops of blood against a green field. It is also known as heliotrope, from the ancient Greek for "sun turner," a name tied to old beliefs that the stone could turn the sun's reflection red when placed in water.

Bloodstone is the far older of the two March stones. Babylonians carved it into seals and amulets; Roman soldiers and later medieval warriors carried it as a stone of courage, strength, and vitality, believing it could stem bleeding and protect them in battle. In the Middle Ages the red flecks were interpreted as drops of Christ's blood, and the stone acquired sacred, healing associations that persisted for centuries. For a long stretch of history, bloodstone — not aquamarine — was simply "the" March birthstone.

So why does the month now belong to aquamarine in most people's minds? When the American National Association of Jewelers formalized the modern birthstone list in 1912, jewelry fashion had shifted decisively toward transparent, faceted gems, and aquamarine's clear, luminous blue was a natural fit for the modern taste. Aquamarine was assigned to March while bloodstone was retained as the traditional alternative — so both remain official March birthstones today. In practice, aquamarine dominates fine jewelry and engagement rings because it is transparent, faceted, and durable at Mohs 7.5–8, while bloodstone (Mohs roughly 6.5–7) is usually cut as cabochons, beads, or carved signet-ring intaglios and reads as a bolder, more masculine or talismanic stone. If bloodstone's deep green speaks to you, explore our wider green gemstone jewelry and men's rings; to understand where the whole birthstone tradition comes from, read our what is my birthstone guide.

Princess Diana's Aquamarine Ring — The Most Famous March Birthstone in History

A personal acquisition that reshaped how the world sees aquamarine.

The most culturally significant aquamarine ring in modern jewelry history belongs to Princess Diana — and understanding it matters not just as trivia but because the ring's story directly shaped how millions of buyers currently think about aquamarine as a meaningful personal stone rather than a secondary birthstone choice.

Diana's aquamarine cocktail ring features a large oval aquamarine — reported to be approximately 37.5 carats — surrounded by a border of solitaire diamonds set in 24-karat yellow gold. The ring was part of a personal jewelry collection Diana assembled independently following her separation from Prince Charles, and she wore it publicly at several significant occasions in 1996 and 1997. Unlike the jewelry she wore as Princess of Wales — which was largely drawn from the royal collection — the aquamarine ring was a personal acquisition that reflected her own aesthetic rather than royal convention.

The ring gained renewed prominence in 2018 when Meghan Markle wore it to the evening reception following her wedding to Prince Harry. Harry had reportedly given Meghan permission to wear pieces from Diana's personal collection, and the choice of the aquamarine ring — rather than any of Diana's more formal royal pieces — was widely interpreted as a nod to Diana's personal character and her independence from royal convention. The ring's sudden high-profile return to the public eye prompted a significant surge in searches for aquamarine rings and March birthstone jewelry that has not fully subsided since.

What is worth noting for buyers drawn to the ring's association: Diana was not a March birthday — she was born in July. She chose aquamarine because she loved the stone, not because of birthstone convention. That choice — deliberately personal, independent of inherited tradition — resonates with the buyers most drawn to aquamarine engagement rings today. The ring is a piece of jewelry that says something specific about who chose it. If you are still discovering your own stone, our what is my birthstone guide is a useful starting point.

For aquamarine specifically, browse March birthstone jewelry and vintage aquamarine jewelry for pieces with that heirloom, royal-era character.

Is Aquamarine Durable Enough for an Engagement Ring?

Mohs 7.5–8, above the quartz threshold, with low cleavage risk.

At Mohs 7.5–8, aquamarine sits comfortably above the quartz threshold — the hardness level that determines whether a stone will be scratched by the silica dust and quartz particles present in household dust and everyday surfaces. Stones below Mohs 7 (moonstone at 6–6.5, opal at 5.5–6.5) will gradually develop surface dulling from daily contact with these materials. Aquamarine does not. Its surface maintains its polish through normal daily activity.

Aquamarine also has no significant cleavage in the directions most relevant to ring wear. Cleavage planes — internal structural weaknesses along which a crystal can fracture from impact — are the more dangerous durability concern for most colored gemstones. Aquamarine's beryl structure has imperfect cleavage in one direction that is not easily reached in typical ring-wear impact scenarios. This distinguishes it from topaz (Mohs 8 but perfect cleavage that makes it fragile despite its hardness) and places it closer to garnet in practical toughness despite its similar hardness rating.

For the full comparison against diamond and sapphire, read aquamarine vs diamond and aquamarine vs sapphire, and browse the sea-blue family in our blue gemstone jewelry.

Best Settings for Aquamarine Engagement Rings

A hardy stone that handles a wider range of settings than most.

Aquamarine at Mohs 7.5–8 handles a wider range of setting styles than softer gemstones. The choice between setting types for aquamarine is primarily aesthetic rather than structural — though certain settings do enhance the stone's specific optical qualities. For the complete rundown, see our engagement ring styles and setting types guide.

Prong Settings — Maximum Light Entry

A prong setting — four or six prongs holding the stone at its girdle — allows the maximum amount of light to enter the aquamarine from all angles, including the sides and through the pavilion from below. For aquamarine specifically, this open light access matters: aquamarine's color is produced by selective absorption at specific wavelengths, and more light entering the stone means more of that characteristic pale blue reaching the observer's eye. A prong-set aquamarine in natural daylight is the fullest expression of the stone's color.

Six-prong settings provide more even grip distribution than four-prong and suit the oval and round cuts most common for aquamarine. For pointed cuts — kite or marquise — V-prong tip protection is appropriate given aquamarine's durability relative to the exposed tip geometry. Browse solitaire engagement rings and gemstone engagement rings.

Halo Settings — Amplified Presence and Sparkle

A halo of smaller diamonds or moissanite surrounding the center aquamarine creates a visual effect particularly well-suited to the stone's soft color. The neutral white sparkle of the halo stones frames the aquamarine's blue without competing with it — the contrast between crisp white sparkle and soft blue creates a layered visual depth that a solitaire aquamarine, however beautiful, cannot fully replicate.

The halo also increases the apparent size of the center stone, which is useful for aquamarine buyers who want a substantial visual presence without moving to a very large center stone. An aquamarine with strong color and clarity reads beautifully in a halo setting at smaller carat weights than a pale stone would require in a solitaire to achieve the same presence. Browse halo engagement rings and women's engagement rings.

Bezel Settings — Modern and Protective

A full bezel setting surrounds the aquamarine's circumference with continuous metal, covering the girdle completely. For aquamarine at Mohs 7.5–8, a bezel is not structurally required the way it is for softer stones — the stone is robust enough for prong wear. But the aesthetic case for bezel aquamarine is strong: the clean metal collar creates a modern, architectural silhouette that suits the stone's glassy clarity and translucency in a way that feels contemporary without being cold.

Partial bezel — metal covering the top and bottom of the girdle while leaving the sides open — provides edge protection while allowing more light into the stone, offering a middle ground between full bezel's maximum protection and the open prong's maximum light entry. Browse aquamarine rings for both prong and bezel silhouettes.

Three-Stone and Toi et Moi Settings

A three-stone aquamarine engagement ring — flanked by diamonds, sapphires, or moissanite — or a toi et moi design pairing aquamarine with a contrasting stone (sapphire and aquamarine is a natural blue family pairing; alexandrite and aquamarine creates a color-change alongside the stable blue) creates a ring with design intent and visual complexity. Aquamarine's translucency and soft color make it a generous pairing partner — it does not compete visually with most companion stones, instead providing a luminous, harmonious foil to whatever sits beside it. Browse aquamarine couples rings and aquamarine wedding bands to pair pieces.

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Aquamarine Engagement Rings

Genuine March-birthstone aquamarine in sterling silver, gold vermeil, and solid gold — handcrafted and made to order in prong, halo, and bezel designs.

Browse Aquamarine Rings

Best Cuts for Aquamarine Engagement Rings

Cut controls color and clarity — the stone's primary assets.

Cut is more consequential for aquamarine than for many other engagement ring stones because the stone's color and clarity are its primary visual assets — not brilliance in the diamond sense. The right cut maximizes both color depth and the glassy transparency that distinguishes a fine aquamarine from a pale, washed-out stone.

Emerald Cut — The Definitive Aquamarine Shape

The emerald cut — a rectangular shape with stepped facets and cropped corners — is the most historically significant and visually appropriate cut for aquamarine. The stepped facets create long, mirror-like reflections that emphasize the stone's glassy clarity rather than producing the brilliance pattern of a brilliant cut. For aquamarine specifically, these broad, flat facets create a window-like depth in the stone — you see into it, not just off it — that is unique to step cuts and is the visual quality most closely associated with fine aquamarine in historical and contemporary jewelry. The emerald cut also makes aquamarine appear more saturated than it is by increasing the path length of light through the stone.

Oval — The Modern Favorite

An oval aquamarine creates the maximum face-up area per carat of any cut — the elongated shape covers more finger than a round or square of equivalent weight, creating a generous visual presence. The curved silhouette also elongates the finger, which is the primary reason oval has become the most popular fancy cut for aquamarine engagement rings in contemporary design. A well-cut oval aquamarine with strong color reads immediately at ring-viewing distance with a clarity and calm that few other stones at its price point can produce.

Pear, Kite, and Marquise — Elongated Statement Cuts

Elongated cuts suit aquamarine's glassy translucency particularly well because they create a teardrop or leaf-shaped window of color that photographs distinctively and reads differently from any standard round or oval. A pear-cut aquamarine in a nature-inspired setting is among the most visually evocative engagement ring configurations in alternative gemstone jewelry — the teardrop shape, the soft blue, and botanical metalwork create a ring that feels genuinely connected to water and the natural world. Browse our full range of aquamarine rings, and pair with matching aquamarine earrings or aquamarine necklaces and pendants.

Best Metals for March Birthstone Rings

Metal choice is a color-theory decision before anything else.

Metal choice for aquamarine is a color-theory decision before it is a durability or style decision. Aquamarine's pale blue-green occupies the cool end of the color spectrum, and the metal surrounding it either reinforces that coolness, contrasts it with warmth, or sits neutrally and lets the stone speak for itself.

For a solid-gold heirloom, see our solid gold rings and sterling silver engagement rings for the accessible classic. Prefer only untreated, natural material? Browse natural aquamarine jewelry.

How to Evaluate Aquamarine Quality Before Buying

Color, clarity, and cut — in that order of priority.

Aquamarine quality is assessed across color, clarity, and cut — in that order of priority. Unlike diamond, where cut quality is standardized and graded by major labs, aquamarine does not have a single cut grade, making buyer judgment more important.

• Color depth is the primary quality indicator. Pale, washed-out aquamarine is abundant and inexpensive. Saturated, medium-to-deep blue aquamarine is significantly rarer and more valuable. The benchmark for fine aquamarine color is a clean, medium blue with slight green undertones — not grey-blue (which indicates poor light performance in the cut), not greenish-yellow (which indicates iron imbalance that heat treatment would normally address), and not so pale that the stone appears almost colorless in indoor light. Test any aquamarine under indoor incandescent light — this is where poor color depth becomes most apparent.
• Eye-clean clarity is the standard. Unlike emerald, which is routinely eye-included and graded accordingly, aquamarine at most price points should be eye-clean — no visible inclusions under normal viewing conditions. Aquamarine is a Type I colored gemstone, meaning it typically forms without visible inclusions and buyers should expect clean material unless buying very large stones. An included aquamarine at standard prices is not a quality stone.
• Cut quality determines how the color reads. A well-cut aquamarine will appear more saturated than the same rough poorly cut — because the cut controls the light path through the stone and therefore how much of the iron-driven color the observer perceives. For step cuts (emerald, Asscher), look for even facet width and parallel lines. For brilliant cuts (oval, round), look for even color distribution across the face-up without dark or washed-out areas at the center.
• Heat treatment is standard and acceptable. The vast majority of aquamarine sold in jewelry has been heat-treated to reduce greenish or yellowish components and produce a purer, more even blue. This is a stable, accepted treatment that does not affect the stone's durability. "Untreated" aquamarine commands a modest premium among collectors but is not a practical concern for engagement ring buyers. See our jewelry care guide.

Explore the full range across aquamarine jewelry and birthstone jewelry.

What Does an Aquamarine Ring Cost?

Accessible relative to diamond and sapphire — with color driving the price.

One of aquamarine's biggest advantages as an engagement stone is value: it delivers strong color, eye-clean clarity, and genuine daily-wear durability without the premium that diamond, sapphire, or emerald command. Price is driven mainly by color saturation. Pale, lightly tinted aquamarine is abundant and inexpensive, while a deeply saturated, medium-blue Santa Maria-grade stone is far rarer and priced accordingly.

As a rough guide, a faceted aquamarine center stone typically ranges from a few hundred dollars up to around fifteen hundred dollars, with per-carat cost rising more sharply above about five carats, where large, well-saturated crystals become scarce. The total price of a finished ring then depends on three further factors: the metal (sterling silver and vermeil are the most accessible; solid gold and platinum cost more), the accent stones (a diamond or moissanite halo adds materially to the price), and the craftsmanship of the setting. Because a beautiful aquamarine can be had at a fraction of a comparable sapphire, many buyers put the savings toward a larger center stone or a more elaborate setting.

Compare the trade-offs directly in aquamarine vs sapphire and aquamarine vs diamond, then browse ready-to-wear options in aquamarine engagement rings and gemstone engagement rings.

Aquamarine Meaning — What the March Birthstone Represents

Water, clarity, and safe passage — across cultures and centuries.

Aquamarine's symbolic associations are among the most consistent in the gemstone tradition — connected to water, clarity, and safe passage across cultures and centuries. In the ancient world the stone was linked to the sea gods; the Romans believed it was sacred to Neptune, and sailors carried aquamarine talismans across the Mediterranean to guarantee a safe voyage and a calm sea, which is why it is still called the sailor's stone. In the Middle Ages aquamarine was given between couples to keep married love pure and lasting, and contemporary crystal practice associates it with emotional clarity, honest communication, and the calm that lets difficult conversations be held with courage rather than defensiveness. These associations developed independently in cultures that had little contact with each other — the most credible form of symbolic resonance.

For engagement rings specifically, the meaning most buyers arrive at is the one that does not require historical research: aquamarine is the color of clear water, and clear water is the visual metaphor for seeing things — and each other — without distortion. A ring that says: I want to see you clearly, and be seen clearly in return. That is a meaningful basis for an engagement stone, and aquamarine earns it without effort. For a broader look at how gemstone meanings developed, see our history of gemstones guide.

Aquamarine does not ask you to choose between personal meaning and aesthetic integrity. The same stone that carries the weight of a March birthday, a Diana-era reference, centuries of oceanic symbolism, and the emotional associations of clarity and calm also looks extraordinary in an emerald-cut platinum solitaire or a nature-inspired rose gold halo. Both things are true simultaneously. That combination — genuine depth and genuine beauty — is what makes aquamarine one of the most compelling engagement stones available in any price range. Browse March birthstone jewelry to find yours.

Aquamarine Ring Care — Daily Habits That Extend Its Life

Light, sensible care keeps the color luminous for years.

• Clean every 2–3 weeks with warm water and mild soap. Aquamarine's clarity is its most prized quality, and clarity is visually compromised by the oils and residue that accumulate on any ring worn daily. A soft toothbrush around the prongs and behind the stone restores full light transmission. Rinse thoroughly in lukewarm water. See our jewelry care guide.
• Aquamarine is ultrasonic-safe (with caveats). Eye-clean aquamarine without significant fractures or inclusions handles ultrasonic cleaning without concern. However, aquamarine with visible fractures or heavily included stones should not be ultrasonically cleaned — the vibration can propagate existing fractures. When in doubt, warm water and a soft brush is always safe.
• Remove before gym, heavy manual work, and chemical exposure. Not because the stone cannot handle these conditions — at Mohs 7.5–8 it generally can — but because sustained repeated impact increases the probability of girdle chipping in prong-set stones and because chlorine and harsh cleaning chemicals attack the metal alloys in the setting rather than the stone.
• Store separately from harder stones. Diamond (Mohs 10) and sapphire (Mohs 9) stored in contact with aquamarine will scratch its surface. A soft pouch or lined compartment in a ring box is appropriate storage.
• Inspect prongs annually. A lifted prong exposes the aquamarine's girdle to direct lateral impact — the most common failure mode for any prong-set colored gemstone. Annual inspection by a jeweler is appropriate for any daily-wear engagement ring regardless of stone type.

Want something made exactly to your specification? Start with our custom ring design service, and read what is my birthstone if you are choosing a stone for someone else.

Frequently Asked Questions

The questions asked most often about March birthstone rings, aquamarine engagement rings, and the stone's color, cost, durability, and meaning.