By Tolga Kavut, founder of Glamour Jewelry House · Updated September 2026
The May birthstone is emerald — the deepest green in the gem world, the stone of spring and growing things, and the obsession of queens from Cleopatra to Elizabeth Taylor. It belongs to the same mineral family as March’s aquamarine, but where aquamarine is clarity and calm, emerald is saturated, dramatic and famously imperfect — and its imperfections are part of the point.

Here is May’s stone the way I’d walk you through it in person: what the color means, why every real emerald has a garden inside it, what the oil in your emerald is doing there, and how to wear the most temperamental of the big three gems without regret.
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May birthstone at a glance
| Birthstone | Emerald |
| May birthstone color | Vivid green, from spring grass to deep bluish forest green |
| Mineral family | Beryl, colored by chromium and vanadium |
| Hardness | 7.5–8 Mohs — hard but brittle where included |
| Main sources | Colombia (Muzo, Chivor), Zambia, Brazil, Ethiopia |
| Meaning | Rebirth, growth, fertility, wisdom |
| Zodiac overlap | Taurus and Gemini |
| Anniversary | 20th and 35th wedding anniversaries |
| Treatment note | Oiling is standard, traditional and disclosed |
What color is the May birthstone?
Green — but a very particular green. The finest emeralds are vivid and slightly bluish, so saturated they seem to hum; Colombian stones are the classic reference, Zambian stones often cooler and darker. Pale green beryl doesn’t get to be called emerald at all — the trade reserves the name for real color intensity, which tells you exactly what to prioritize when buying.
May’s color meaning is the easiest on the calendar: green is growth. Spring leaves, new starts, fertility, life doing what life does. Ancient Egypt buried emeralds with the dead as a promise of eternal youth; Rome assigned the stone to Venus.
The garden inside: why real emeralds have inclusions
Here is what surprises every first-time emerald buyer: a perfectly clean emerald is a suspicious emerald. The stone forms under such violent conditions that internal fractures and mineral traces are nearly universal — jewelers call them the jardin, the garden, and read them the way you read grain in wood. They are the fingerprint proving your stone grew in the earth.
About the oil: for centuries cutters have soaked emeralds in colorless oil to soften the visibility of surface-reaching fractures. This is standard and assumed for virtually every emerald on the market — the honest question isn’t whether an emerald is oiled but how much. Minor enhancement is the sweet spot; heavy filling on a cheap stone is where you walk away.
A short history of emerald
Cleopatra claimed Egypt’s emerald mines as personal property and handed carved emeralds to visiting dignitaries as souvenirs of herself — the original personalized jewelry. When the Spanish reached South America in the 1500s they found the Muzo people mining emeralds finer than anything the old world had seen, and Colombian stones have set the standard ever since. The Mughal emperors carved prayers into flat emerald tablets; the Crown of the Andes carried 450 of them.
How to buy a good emerald
Color buys the stone. A smaller emerald with vivid, even green beats a bigger pale one, always.
Judge inclusions by eye, not loupe. The jardin should read as character at conversation distance, not as cracks. Avoid fractures reaching the surface at corners — that is where chips start.
Prefer settings that protect. The emerald cut, with its clipped corners, was literally invented to protect this stone’s vulnerable edges; bezels and halos do the same job today.
Caring for emerald jewelry
The strictest rules of any big-three gem: never ultrasonic cleaners, never steam, never harsh solvents — all three strip the oil and turn a lovely stone cloudy. Lukewarm water, mild soap, soft cloth, and re-oiling by a jeweler every few years if needed.
Shop May birthstone jewelry
Every piece is made to order in 18K gold — choose emerald at checkout for a May birthday, and add a name, initial or date if you’d like it engraved.
Emerald StudsFrom $57
Emerald Hoop Dangle EarringsFrom $57
CZ Emerald RingFrom $57
Natural Birthstone NecklaceFrom $57
Teardrop Birthstone NecklaceFrom $58
Family Birthstone NecklaceFrom $59
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May birthstone jewelry: where to start
Given all of the above, my May advice is more pointed than most months: emerald wants to be a necklace. A pendant lives a padded life at the collarbone — no doorframes, no gym bars — and a bezel-set May birthstone necklace adds a metal guard rail around the girdle. If your heart is set on a May birthstone ring, choose a low, protective setting and treat it as an occasion ring.
In a family birthstone necklace or a personalized birthstone bracelet, a May stone is the piece of spring in the lineup — and pendants and bracelets happen to be exactly where emerald is safest.
May birthstone questions
What is May’s birthstone?
Emerald — vivid green beryl, the stone of rebirth and growth, and May’s only official birthstone on the modern list.
What color is the May birthstone?
Vivid green, ideally with strong saturation and a slight bluish cast. Colombian emeralds are the classic reference color.
Do all emeralds have flaws?
Virtually all natural emeralds contain visible inclusions — the jardin — and almost all are oiled to soften them. Both are normal and expected.
Is emerald okay for everyday wear?
In necklaces, earrings and bracelets, yes. In rings it needs a protective setting and some discipline; emerald is hard but brittle and hates ultrasonic cleaners.
Why is emerald associated with May?
Its green has symbolized spring and rebirth since antiquity, making it the natural stone for the calendar’s greenest month.
Birthstones for every month
Each month has its own guide to its stone, color and meaning — or start with the complete birthstones by month chart.
- January birthstoneGarnet · Deep red
- February birthstoneAmethyst · Violet purple
- March birthstoneAquamarine · Sea blue
- April birthstoneDiamond · Colorless
- May birthstoneEmerald · Vivid green
- June birthstonePearl · Cream white
- July birthstoneRuby · Rich red
- August birthstonePeridot · Olive green
- September birthstoneSapphire · Royal blue
- October birthstoneOpal · Play-of-color
- November birthstoneTopaz · Golden yellow
- December birthstoneTurquoise · Robin’s-egg blue
You might also like
- March birthstone — aquamarine, emerald’s blue sister in the beryl family
- August birthstone — peridot, May’s other green birthstone rival
- January birthstone — tsavorite garnet, a green stone that rivals emerald
Written by Tolga Kavut
Founder of Glamour Jewelry House — an independent US jewelry brand rated 4.77★ across 21,000+ customer reviews. A former professional fashion photographer, Tolga designs, sources, photographs and sells every piece himself, and has set birthstones into thousands of custom necklaces, rings and bracelets.