A stone shaped by iron, named for the sea, and prized for a blue that can range from barely there to remarkably deep.

Aquamarine looks almost impossibly clean.

Where turquoise carries matrix and moss agate creates landscapes within the stone, aquamarine often does the opposite. Fine examples can be exceptionally transparent—a clear wash of blue or green-blue that seems less like something taken from the earth than something pulled from open water.

But aquamarine is very much a mineral of the earth. It is a variety of beryl, the same mineral family that gives us emerald and morganite. Its blue color comes primarily from iron within the crystal structure, and its combination of clarity, color and durability has made it a jewelry stone for centuries (Gemological Institute of America [GIA], n.d.-a; Smithsonian National Museum of Natural History, n.d.-a). gia

And then there is the name.

Aquamarine comes from the Latin words for water and sea. Long before anyone understood its chemistry, that resemblance to seawater helped give the stone a mythology of protecting sailors and safe passage at sea (GIA, n.d.-b). gia

For a stone that can look so quiet, aquamarine has quite a story.

Aquamarine at a Glance

Mineral	Beryl
Chemical composition	Be₃Al₂Si₆O₁₈
Color	Blue to greenish blue
Color source	Primarily iron
Mohs hardness	7.5–8
Transparency	Typically transparent
Common treatment	Heat treatment to reduce green tones and produce a bluer appearance
Major sources	Brazil, Pakistan and several African countries, among others
Birthstone	March
Traditional associations	The sea, sailors, protection and safe passage

(GIA, n.d.-a; GIA, n.d.-b; GIA, n.d.-c). gia

What Is Aquamarine?

Aquamarine is the blue to greenish-blue variety of the mineral beryl.

That puts it in surprisingly distinguished company.

Emerald is also beryl. So is pink morganite, yellow heliodor and colorless goshenite. Pure beryl itself is colorless; different trace elements incorporated into the crystal as it forms are responsible for the colors seen in its gem varieties (GIA, n.d.-d). gia

In aquamarine, iron is responsible for the blue and green-blue coloration. Research into beryl's color chemistry shows that different states and positions of iron within the crystal influence whether beryl appears blue, green or yellow (Hu & Lu, 2020). gia

That's also an interesting contrast with its famous green relative.

Emerald generally owes its green color to chromium and/or vanadium, while aquamarine gets its color from iron. They share the same basic mineral structure but arrive at dramatically different appearances through different trace chemistry. gia

Why Is Aquamarine Blue?

The color most people associate with aquamarine is a clear, cool blue, but natural aquamarine can actually range from green-blue through slightly greenish blue to a purer blue.

Morambaya, Minas Gerais, Brazil, South America

GIA describes the preferred color in fine aquamarine as moderately strong dark blue to slightly greenish blue. Because aquamarine is often light in tone, larger stones can show color more strongly than very small stones (GIA, n.d.-e). gia

That means aquamarine doesn't have one single "correct" blue.

One stone may resemble pale ice. Another can carry a much richer ocean blue. The variation is natural—and part of what makes the stone interesting.

Is Aquamarine Usually Heat Treated?

Yes. Heat treatment is common in aquamarine and is generally used to reduce greenish tones and create a bluer appearance.

Untreated aquamarine frequently contains some degree of green. Controlled heating can remove much of that green component, leaving the stone looking more purely blue (GIA, n.d.-f). gia

Unlike treatments intended to disguise significant defects, heating aquamarine is primarily about color modification.

That distinction is worth understanding when shopping for aquamarine jewelry. A beautiful blue aquamarine isn't necessarily untreated, and treatment alone does not mean a stone is poor quality.

Where Does Aquamarine Come From?

Aquamarine is found in a number of places around the world.

Brazil has been one of its most important sources, particularly the state of Minas Gerais, which has produced aquamarine for roughly two centuries. Important deposits also occur in Pakistan, where aquamarine is mined in the mountains of the Karakoram region at extraordinary elevations (GIA, n.d.-b). gia

Aquamarine with muscovite from the Gilgit region of Pakistan. Smithsonian National Museum of Natural History.

Other sources include Madagascar, Nigeria, Zambia, Mozambique and Kenya, along with deposits in China, Myanmar, Russia, Ukraine and the United States. Aquamarine has even been found in Colorado's Mount Antero area, and aquamarine is Colorado's state gemstone (GIA, n.d.-b). gia

One especially interesting feature of aquamarine is the size its crystals can achieve. Unlike many gemstones, beryl can form exceptionally large, well-developed crystals. GIA notes that some aquamarine crystals grow large enough to produce fashioned gems well over 100 carats. GIA Archives

Aquamarine and the Sea

Aquamarine's association with water is not a modern marketing invention.

Its name comes from the Latin aqua, meaning water, and mare, meaning sea. Historical lore connected the stone with sailors, who carried aquamarine as a protective talisman and associated it with calm seas and safe return from voyages (GIA, n.d.-b). gia

Today you'll often see aquamarine described as a stone of calm, clarity, courage or protection.

Those ideas belong to the stone's cultural and symbolic history rather than to scientifically demonstrated properties. But the maritime connection is unusually fitting: even without knowing its name or its history, aquamarine often looks like water.

Sometimes that is enough to understand why a story endured.

What Does Aquamarine Symbolize?
Traditionally, aquamarine has been associated with the sea, protection during travel, calm waters and safe passage. It later became associated with harmony in marriage as well (GIA, n.d.-a).

It is also the traditional birthstone for March and is recognized as the gemstone for the 19th wedding anniversary.

At Quinn Henry, we see that symbolism as part of the stone’s story—meaningful to some, simply beautiful to others.

With aquamarine, that story is an especially good one: water, distance, travel and the hope of returning safely home.

Is Aquamarine Good for Men's Jewelry?

Very much so.

Against oxidized or matte sterling silver, aquamarine changes character. The cool silver pulls the stone away from pastel sweetness and emphasizes its more elemental qualities: ice, water, stone and sky.

A heavily faceted pale aquamarine can feel polished and formal. A cabochon or minimally cut stone, particularly in a substantial silver setting, can feel much more rugged and understated.

That's the version of aquamarine that interests us.

Why Aquamarine and Sterling Silver Work Together

Some stones need contrast.

Aquamarine doesn’t.

Sterling silver and aquamarine occupy much of the same cool visual world. Silver carries gray, white and reflected blue; aquamarine moves between nearly colorless, blue and green-blue. Put them together and neither material has to compete with the other.

At Quinn Henry, our lightly oxidized silver adds contrast through texture while keeping the palette restrained. A highly transparent stone set against silver that still bears the texture of the maker’s hand creates a tension between refined and raw.

That balance is exactly what draws us to the combination.

Is Aquamarine Durable Enough for Everyday Wear?

Yes. Aquamarine is generally a good gemstone for jewelry worn regularly.

Aquamarine measures 7.5 to 8 on the Mohs hardness scale, giving it good resistance to scratching compared with many other colored gemstones. GIA considers aquamarine suitable for everyday jewelry when worn with reasonable care (GIA, n.d.-c). gia

Hardness does not mean indestructibility, however. A sharp impact can still chip or damage a stone, particularly around exposed edges, so aquamarine jewelry should still be treated with normal care.

For everyday wear, the combination of good hardness, natural clarity, and relatively easy care makes aquamarine a practical choice as well as a beautiful one.

How Do You Care for Aquamarine?

The simplest method is usually the best.

Warm water, mild soap and a soft brush are safe for aquamarine. GIA notes that steam and ultrasonic cleaning are generally acceptable for untreated stones without problematic inclusions or fractures, but warm soapy water remains the safest universal approach (GIA, n.d.-c). gia

Avoid hard impacts, abrasive cleaners and unnecessary exposure to extreme heat.

No Two Aquamarines Are Exactly Alike

Aquamarine doesn't vary as dramatically as stones such as moss agate or turquoise, but natural variation is still part of the material.

Some stones are nearly colorless blue.

Others have visible green.

Some are exceptionally clean.

Others contain internal characteristics or inclusions that immediately reveal their natural origin.

Even color changes with size: smaller aquamarines frequently appear paler because there simply isn't as much material through which light can travel (GIA, n.d.-e). gia

We don't think that variation is something to engineer away. It is evidence that you're looking at real stone.

The Quinn Henry Perspective

Aquamarine is quieter than many of the stones we use.

That’s precisely the attraction.

Pietersite can look like a storm. Moss agate can feel like a landscape. Turquoise carries thousands of years of visual history before you even know its story.

Aquamarine is different.

Its appeal is stripped almost to the essentials: blue, light and transparency.

At Quinn Henry, we often pair aquamarine with sterling silver and with other natural stones—sometimes in neighboring shades of blue, green or gray, and sometimes with sharper contrast. In those combinations, aquamarine brings a sense of calm to the piece without disappearing into it.

And behind that simple blue is an unexpectedly long trail: iron trapped inside beryl, crystals pulled from mountains, sailors carrying stones against uncertain seas, and a name that has meant water of the sea for centuries.

Silver. Stone. Story.

Aquamarine has all three.

Frequently Asked Questions About Aquamarine

Is aquamarine the same mineral as emerald?

Yes. Aquamarine and emerald are both varieties of beryl. Aquamarine's blue color is primarily associated with iron, while emerald's green is generally produced by chromium and/or vanadium. gia

Is aquamarine naturally blue?

Yes. Natural aquamarine ranges from blue to greenish blue. Heat treatment is commonly used to remove some of the green and create a purer blue appearance. gia

Is darker aquamarine more valuable?

Color is an important quality factor, and stronger blue to slightly greenish-blue colors are generally preferred. Clarity and cut also contribute to quality. gia

Among the most prized aquamarines are stones described as Santa Maria aquamarine, a name originally associated with richly saturated blue material from Brazil’s Santa Maria de Itabira mine. Because of their deeper, more vivid blue color, fine Santa Maria stones can command a premium over lighter aquamarine of comparable clarity and cut.

Is aquamarine good for everyday jewelry?

Yes. Its Mohs hardness of 7.5–8 makes aquamarine relatively durable for everyday jewelry, although it should still be protected from hard impacts. gia

Is aquamarine a March birthstone?

Yes. Aquamarine is one of the traditional birthstones for March. gia

Where is aquamarine mined?

Major and historically important sources include Brazil and Pakistan, with additional production from countries including Madagascar, Mozambique, Nigeria, Zambia and Kenya. gia

What does aquamarine symbolize?

Historically, aquamarine has been associated particularly with sailors, calm seas and protection during voyages. Modern symbolic interpretations also associate it with calm and clarity, though these are cultural traditions rather than scientifically demonstrated properties. gia

References

Gemological Institute of America. (n.d.-a). Aquamarine. Gem Encyclopedia. Mineral composition, color, hardness, quality factors and historical overview. GIA Aquamarine Gem Encyclopedia gia

Gemological Institute of America. (n.d.-b). March Birthstones: Aquamarine and Bloodstone. History, symbolism and geographic sources. GIA March Birthstones gia

Gemological Institute of America. (n.d.-c). Aquamarine Care and Cleaning Guide. Hardness, durability and cleaning recommendations. GIA Aquamarine Care Guide gia

Gemological Institute of America. (n.d.-d). GIA's Gübelin Gem Project: Beryl. Beryl varieties and causes of color. GIA Beryl Project gia

Gemological Institute of America. (n.d.-e). Aquamarine Buyer's Guide. Color, clarity, size and quality factors. GIA Aquamarine Buyer's Guide gia

Gemological Institute of America. (n.d.-f). An Introduction to Gem Treatments. Discussion of heat treatment and aquamarine color modification. GIA Gem Treatments gia

Hu, Y., & Lu, R. (2020). Color Characteristics of Blue to Yellow Beryl from Multiple Origins. Gems & Gemology, 56(1). Research on iron and coloration in beryl. GIA Gems & Gemology research article gia

Smithsonian National Museum of Natural History. (n.d.-a). Beryl (var. aquamarine). National Gem Collection. Smithsonian Aquamarine Collection Smithsonian Natural History Museum