May Birthstone: Emerald
Emerald is the modern birthstone for May, a rich green variety of beryl that has been prized for thousands of years. Here is what it means, how to wear it without trouble, and which gifts suit a May birthday.
Key Takeaways
- The May birthstone is emerald, a green variety of the mineral beryl, recognised by both the GIA and the American Gem Society.
- Emerald's green colour comes from trace amounts of chromium and vanadium sitting inside the beryl crystal.
- It rates 7.5 to 8 on the Mohs hardness scale, so it resists scratching well, but it is brittle because most emeralds carry internal inclusions and fractures.
- Most emeralds are treated with oils or resins to fill those fractures, which is common and accepted, so never clean an emerald in an ultrasonic or steam cleaner.
- Emerald is also the gift gemstone for the 20th and 35th wedding anniversaries, according to the GIA.
What is the May birthstone?
The May birthstone is emerald, the green member of the beryl family. There is no split between a modern and traditional stone for May the way there is for some months. Both the GIA and the American Gem Society list emerald, so anyone born in May gets the same answer wherever they look.
Beryl on its own is colourless. What turns it into emerald is a small amount of chromium, and sometimes vanadium, sitting inside the crystal. That is the same mineral that gives us aquamarine, the March birthstone; the only real difference is the trace element doing the colouring. Aquamarine reads blue, emerald reads green, and they grow as the same six-sided crystal.
Meaning and a bit of history
Emerald has stood for growth, renewal and new life for a very long time, which is fitting for a spring birthstone. The colour does most of the talking: it is the green of new leaves, so people have tied it to fresh starts, loyalty and steady fortune for centuries.
It is genuinely old. Emeralds were mined in Egypt and were famously linked to Cleopatra, who is said to have favoured them above other stones. Colombia produced some of the finest material the world has seen, and good emerald still comes out of Colombia, Brazil, Zambia and Afghanistan today, as the GIA notes. Alongside diamond, ruby and sapphire, emerald is counted as one of the four classic precious gemstones.
An honest word on durability and care
This is the part a good jeweller tells you before you buy, not after. Emerald is hard but not tough, and those are two different things.
Hardness measures how well a stone resists scratches. On that count emerald does well, sitting at 7.5 to 8 on the Mohs scale per the GIA, harder than quartz and well above everyday dust. Toughness is different: it measures resistance to chipping and breaking. Here emerald is on the fragile side, because nearly every emerald grows with internal inclusions and tiny fractures. Those features are so normal in emerald that the trade has a nickname for them, the "jardin," French for garden. They are part of the stone's character, but they also make it more likely to chip on a hard knock than a sapphire or a diamond would.
On top of that, most emeralds on the market are treated. The fractures that reach the surface are filled with oil or resin to improve clarity, which the American Gem Society describes as common and accepted. The catch is that this filling can be disturbed by heat and vibration.
So the care rules are simple. Never put an emerald in an ultrasonic cleaner or a steam cleaner; both can drive the oil out of the fractures and leave the stone looking cloudy or worse. Clean it with lukewarm water, a drop of mild dish soap and a soft brush, then pat it dry. Take emerald rings off before gardening, sport or heavy housework. On our Coquitlam bench we steer customers who want an everyday emerald ring toward a protective bezel or a halo setting that shields the edges, and we re-oil tired emeralds in for repair rather than blasting them clean. If you want the wider picture on how stones differ, our full gemstone guide walks through it.
Emerald at a glance
| Property | Detail |
|---|---|
| Mineral | Beryl |
| Colour | Green, from chromium and/or vanadium |
| Mohs hardness | 7.5 to 8 |
| Toughness | Poor to fair (brittle; often included) |
| Common treatment | Oil or resin to fill fractures |
| Avoid | Ultrasonic and steam cleaning |
| Anniversaries | 20th and 35th |
Emerald gift ideas for a May birthday
Because emerald is brittle, the setting matters as much as the stone. For a May birthday gift that gets daily wear, pendants and earrings are the easy win: they take far fewer knocks than a ring, so the green stays bright with little fuss. A pendant on a fine chain shows emerald's colour off beautifully and asks almost nothing of the wearer.
If you do want a ring, choose a setting that protects the stone. A bezel that wraps metal around the edge, or a halo of small diamonds, guards the corners where chips start. Emerald also pairs well with both yellow and white metals; warm gold deepens the green, while white gold or platinum makes it read cooler and brighter.
Emerald is the gift stone for the 20th and 35th wedding anniversaries too, per the GIA, so it does double duty for a milestone year. If you are not sure a loose emerald is right for the recipient's lifestyle, talk to us first; our on-site goldsmith can match the stone to a setting that will actually survive how the person lives. You can browse the whole month-by-month list on our birthstones by month guide, or compare May with neighbouring months like February's amethyst and January's garnet.
Frequently Asked Questions
What is the birthstone for May?
The May birthstone is emerald, a green variety of the mineral beryl. Both the GIA and the American Gem Society list emerald for May, and there is no separate modern-versus-traditional stone for the month.
Why is emerald green?
Emerald gets its green colour from trace amounts of chromium and sometimes vanadium inside the beryl crystal. Pure beryl is colourless; those trace elements are what create the rich green.
Is emerald durable enough for everyday wear?
It depends on the setting and your lifestyle. Emerald is hard at 7.5 to 8 on the Mohs scale, so it resists scratching, but it is brittle because most emeralds contain internal fractures and inclusions. For daily wear, a protective bezel or halo setting and a bit of caution go a long way. Pendants and earrings take fewer knocks than rings.
How do I clean an emerald?
Use lukewarm water, a little mild dish soap and a soft brush, then pat dry. Never use an ultrasonic or steam cleaner, because most emeralds are treated with oil or resin in their fractures and the heat and vibration can damage that treatment.
What anniversary is emerald for?
Emerald is the gift gemstone for the 20th and 35th wedding anniversaries, according to the GIA, which makes it a natural choice for a May birthday or a milestone year.
Are treated emeralds a problem?
No. Oiling or resin-filling the natural fractures is common and accepted across the trade. It is not a defect, but it does mean the stone needs gentle care and should never go in an ultrasonic or steam cleaner. A jeweller can re-oil an emerald if its treatment fades over time.