birthstones · March
Aquamarine
March's pocket of calm sea · Also for this month: bloodstone
'Water of the sea' in Latin, and exactly that in the hand: March's pale-blue beryl, the sailor's stone of safe passage and unclouded eyes — spring's first thaw, mineralised.
Story & folklore
Roman sailors slept on it for Neptune's favour; medieval lore made it the antidote-stone and the seer's clarifier; brides received it for smooth marital waters. Everything in its file says the same word differently: calm.
The honest paragraph
The sea listens to no gemstone — sailors' aquamarines outlived many sailors. The honest cargo is the colour itself: pale blue measurably reads as calm to human eyes, and a sea you can pocket is a breathing cue with a setting. March babies get portable weather; the good kind.
The cat watches the storm from the windowsill, unbothered: "Calm seas. An internal matter."
Birthstone meanings are tradition and story, told with affection — a lovely lens for a gift or a self-portrait, never a verdict or a promise.
Aquamarine history and famous stones
Aquamarine is the blue to blue-green variety of beryl, the same mineral family as emerald, coloured by traces of iron. It often grows as large, clean crystals, so it’s one of the few gems regularly cut into big, eye-clean stones. The most famous is the Dom Pedro, a tall obelisk carved from a Brazilian crystal, now in the Smithsonian in Washington. Brazil remains a major source, alongside Madagascar, Nigeria, Mozambique and Pakistan. Russia has its own history of aquamarine from the Urals and Transbaikalia.
Aquamarine colours: from sea-foam to deep blue
- Pale sky blue: the most common, fresh and airy, lovely in daylight.
- Medium to deep blue: the most valued. The trade name “Santa Maria” refers to intensely blue stones, originally from a Brazilian mine.
- Blue-green (“sea-green”): natural and attractive, though usually priced a little lower.
Many aquamarines are gently heated to remove a greenish tint. This is standard, stable and doesn’t need special care. Aquamarine is also pleochroic: it looks bluer from one direction and paler from another, so a good cutter orients the stone to show its best blue face-up.
How to choose a real aquamarine and spot imitations
- Blue topaz is the most common look-alike. It’s usually more saturated and electric (“Swiss” or “London” blue), while aquamarine tends to be softer and slightly greyish-blue. Telling them apart reliably needs a gemmologist.
- Synthetic spinel and glass are cheaper imitations. Glass shows bubbles and swirls under a loupe and scratches easily.
- Good aquamarine is usually clean to the eye. Visible cracks or cloudiness lower the value but not the charm, and milky stones are sold cheaply for beads.
- Ask whether the colour is natural or heated. Both are acceptable, but you should know.
Aquamarine care, gifts and symbolism
At 7.5 to 8 on the Mohs scale, aquamarine is tough enough for everyday rings, though a sharp knock can still chip an edge. Clean it with warm soapy water and a soft brush. Clean stones usually tolerate an ultrasonic cleaner, but stones with visible inclusions are best cleaned by hand.
Gift ideas include a solitaire pendant for a March birthday, a cocktail ring with a large emerald-cut stone or aquamarine earrings for a bride’s “something blue”. In the symbolic tradition it’s the stone of calm, clear communication and safe journeys. It’s a lovely message for someone about to travel or start a new chapter. March’s flower is the daffodil. For a calm evening practice to go with the stone, try our evening ritual.