Any Rock Identifier

March Birthstone

March owns the strangest pairing on the birthstone chart: aquamarine, a transparent blue gem named for seawater, and bloodstone, an opaque dark-green stone spotted with blood-red flecks. One is serene and oceanic, the other ancient and dramatic — and both are fully official, one from the modern list and one carried over from centuries of tradition.

The pairing is really a history lesson: bloodstone was March's stone for hundreds of years — the warrior's and martyr's talisman — until the 1912 modern list promoted aquamarine, the more giftable transparent gem. This page covers both: what they are, which color represents March, and how to pick between sea-blue and battle-green.

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The March birthstones

What color is the March birthstone?

The March birthstone color is pale blue — aquamarine's light, watery seawater blue is what every chart and birthstone-jewelry line uses for the month. Deeper, more saturated blues exist (and cost more), but the signature March shade is the airy pastel one.

Bloodstone gives March an unofficial second palette — deep forest green flecked with red — for anyone who wants the traditional stone. There's no wrong answer: blue is the modern chart color, green-and-red the ancient one.

How March got its birthstones

Bloodstone's tenure came first and lasted longest: to the Babylonians and Romans it was a stone of warriors; medieval Europe called it the martyr's stone, carving crucifixion scenes in which its red spots became drops of blood, and lore held it could staunch bleeding — soldiers carried it into battle for exactly that reason. On the old traditional lists, March belonged to bloodstone.

Aquamarine's name is Latin — aqua marina, seawater — and Roman sailors carried it as protection on voyages, believing it calmed waves. But its promotion to March's headline stone is modern: the 1912 US list chose it as the month's transparent, jewelry-friendly gem, and later revisions kept bloodstone alongside as the traditional alternative. The two now share the month roughly along style lines: aquamarine for classic jewelry, bloodstone for signets, carvings and anyone drawn to the older story.

Choosing & caring for March birthstones

Aquamarine: color drives price — deeper blue costs more, and the palest stones are very affordable in large sizes. Expect eye-clean clarity as the norm (visible inclusions should mean a discount), and know that most commercial aquamarine is gently heated to remove green tinge — stable and standard. Beware 'aqua-colored' imitations: blue topaz and synthetic spinel mimic it closely at half the price. Bloodstone: judge the pattern — well-defined red spots on dark green beat vague brownish smears — and check that the red is natural iron oxide, not dye pooling in surface cracks. It is inexpensive, so heavy price tags need justifying.

Frequently asked questions

What is the March birthstone?

March has two: aquamarine (the modern stone, on the US list since 1912) and bloodstone (the traditional stone it inherited from older lists). Aquamarine is the conventional answer; bloodstone is equally official for anyone who prefers the ancient option.

What color is the March birthstone?

Pale seawater blue — aquamarine's signature pastel shade is the standard March color on charts and jewelry. Bloodstone offers the traditional alternative palette: dark green with red flecks.

Are aquamarine and emerald the same mineral?

Yes — both are beryl. Iron makes aquamarine blue; chromium (or vanadium) makes emerald green. The practical difference: aquamarine usually grows clean and flawless while emerald is almost always included, which is why a clean aquamarine costs a fraction of a comparable emerald.

Why is bloodstone a March birthstone?

It held the month on the older, traditional lists for centuries — as the warrior's and martyr's stone, its red iron-oxide flecks read as drops of blood, and lore credited it with stopping bleeding. When the 1912 modern list gave March to aquamarine, bloodstone stayed on as the recognized traditional stone.

How can I tell real aquamarine from blue topaz or glass?

Blue topaz is the common stand-in: it's denser, its blue is usually more vivid ('Swiss' or 'London' blue, from treatment), while aquamarine leans subtle greenish-blue. Glass shows round bubbles under a loupe and warms quickly in hand. Aquamarine is also weakly dichroic — tilt it and the blue shifts slightly toward colorless. A photo through our identifier plus the aquamarine field guide covers the rest.

More birthstones

See the full birthstones-by-month chart or jump to April, August, December, February, January, July, June, May, November, October, September.

Last updated 2026-07-19