Why do different sources give different birthstones for this month?

Because they are copying different lists without saying which. The modern American list of 1912 and its revisions, older European traditional lists, and various regional lists all disagree, and none of them is an authority over the others. Any page presenting one answer as the birthstone is hiding a real disagreement.

Where did the modern birthstone list come from?

The American National Association of Jewelers agreed a standard list in 1912 so that shops in different states would stock and advertise the same stones. It was revised in 1952, tanzanite was added to December in 2002, and spinel to August in 2016. It is a commercial standard, and it works well as one.

Which is the real March birthstone?

Both, officially. The modern list names aquamarine and bloodstone together, and the traditional lists name bloodstone alone. Aquamarine is what jewellers stock because it is a faceted gem that sells; bloodstone is what the older texts describe. Neither has a better claim.

Is my aquamarine heated?

Almost certainly. Most aquamarine comes out of the ground with a green cast, and gentle heating shifts it to pure blue permanently. It is standard, stable, disclosed by good dealers, and it does not affect durability.

Do I have to wear my birthstone?

No. The month list is a shared convention rather than a prescription, and the only tradition that treats a stone as genuinely obligatory or inadvisable is Jyotish, which works from a birth chart rather than a birth month. A stone you chose for yourself will do more for your practice than one assigned by a committee.

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Birthstone · Month

March: aquamarine and bloodstone

March is the first month in the calendar where the lists genuinely disagree, and the modern standard resolved it by keeping both. Aquamarine is the stone most people are given; bloodstone is the one the older tradition names, and it has a much stranger history.

At a glance

A month with two answers, and both of them old. Aquamarine is the modern choice; bloodstone was there first.

Modern list (1912 onward): Aquamarine and bloodstone
Traditional European lists: Bloodstone, sometimes jasper
Older alternatives cited: Jasper, rock crystal
Zodiac signs in this month: Pisces, Aries
Vedic gems for those signs: Yellow sapphire for Pisces, red coral for Aries
Hardness: Aquamarine 7.5, bloodstone 7. Both wearable.

Themes

safe passage courage the turn of the year water two answers

The modern answer

The 1912 list gave March both aquamarine and bloodstone, and both remain standard.

Aquamarine is beryl coloured blue-green by iron, the same mineral as emerald with a different trace element. Its name is Latin for seawater, and its association is with the sea and with safe passage across it. Roman sailors carried it and offered it to Neptune for calm water, and the association has been remarkably stable ever since.

Bloodstone, also called heliotrope, is green chalcedony flecked with red iron oxide. It is a much older stone in European tradition and carries a far more dramatic set of claims.

The older lists

Traditional European lists give March to bloodstone alone, and often name jasper as an alternate, which is loose usage for a related chalcedony.

Bloodstone's Christian legend holds that it formed when drops of Christ's blood fell on green jasper at the foot of the cross, which made it a material for carving devotional objects in the medieval period. The Greek name heliotrope, sun-turner, comes from an older belief recorded by Pliny that the stone placed in water would turn the reflection of the sun blood red.

The lapidaries give it the power to staunch bleeding, which is a doctrine of signatures argument, and Marbode adds that it makes the wearer's words persuasive.

Aquamarine's own older role is the sailor's amulet, and it is one of the few stone meanings found independently in the Mediterranean and in South Asia.

What these two are like to own

Aquamarine is a genuinely good daily stone: hardness 7.5, tough enough for a pendant or a protected ring, and widely available. Almost all of it is heated to shift a greenish cast towards pure blue, which is permanent, stable and standard. Untreated greenish material is sought by some collectors precisely because it is unusual.

Bloodstone is chalcedony at hardness 7 with no cleavage, which makes it one of the most robust stones in the whole catalogue. It is inexpensive, and its main risk is that dyed green chalcedony with red flecks is sometimes substituted.

Between the two, bloodstone is by far the better choice for something you intend to carry roughly.

If you would rather have something else

The March signs are Pisces and Aries, and the zodiac lists give Pisces aquamarine, which agrees with the calendar, and Aries carnelian or bloodstone.

That overlap makes March one of the easier months to reconcile. If you were born in the first three weeks you can take aquamarine from both the month and the sign; if you were born after the equinox, bloodstone serves the month and the sign together.

In Jyotish, which works from a sidereal chart rather than a sun sign, Pisces answers to Jupiter and Aries to Mars, whose gems are yellow sapphire and red coral. Red coral raises a conservation question the library takes seriously, and much of what is sold as it is dyed bamboo coral or reconstituted powder.

Questions for reflection

What journey am I about to begin, and what would make it safer?
Where do I need courage rather than calm, or calm rather than courage?
If two answers are both traditional, what does that tell me about tradition?

The stones named here

🔵

Aquamarine

The modern March stone

🟢

Bloodstone

The older one, and the tougher one

♓

Pisces

The sign covering most of March

♈

Aries

The sign after the equinox

🪨

Beryl

Where aquamarine sits

Frequently asked questions

: Because they are copying different lists without saying which. The modern American list of 1912 and its revisions, older European traditional lists, and various regional lists all disagree, and none of them is an authority over the others. Any page presenting one answer as the birthstone is hiding a real disagreement.
: The American National Association of Jewelers agreed a standard list in 1912 so that shops in different states would stock and advertise the same stones. It was revised in 1952, tanzanite was added to December in 2002, and spinel to August in 2016. It is a commercial standard, and it works well as one.
: Both, officially. The modern list names aquamarine and bloodstone together, and the traditional lists name bloodstone alone. Aquamarine is what jewellers stock because it is a faceted gem that sells; bloodstone is what the older texts describe. Neither has a better claim.
: Almost certainly. Most aquamarine comes out of the ground with a green cast, and gentle heating shifts it to pure blue permanently. It is standard, stable, disclosed by good dealers, and it does not affect durability.
: No. The month list is a shared convention rather than a prescription, and the only tradition that treats a stone as genuinely obligatory or inadvisable is Jyotish, which works from a birth chart rather than a birth month. A stone you chose for yourself will do more for your practice than one assigned by a committee.

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