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, the green variety of the mineral beryl, per the American Gem Society modern list.
- Emerald sits at 7.5 to 8 on the Mohs scale, but its many internal inclusions make it more brittle than that number suggests, so it needs careful handling (IGS durability).
- The colour ranges from a light spring green to a deep, slightly bluish forest green; the most prized stones are strongly saturated with an even tone.
- Almost every natural emerald has visible inclusions, often called the jardin (French for garden). This is normal and not a fault.
- Emerald is also the traditional gift for a 20th wedding anniversary, which makes it a natural choice for a milestone commission.
- We design and build emerald pieces in-house at our Coquitlam studio, and we'll steer you towards a protective setting because of the stone's brittleness.
What is the May birthstone?
The May birthstone is emerald. It has held that spot on the modern list kept by the American Gem Society since the list was standardised in 1912, and it remains the only stone assigned to the month. If you were born in May, emerald is your one option, which keeps the choice simple even if the stone itself asks for a little care. You can see how it sits alongside the rest of the calendar on our birthstones guide.
What emerald is and how it wears
Emerald is the green member of the beryl family, the same mineral group that gives us aquamarine. Its colour comes from traces of chromium and sometimes vanadium, and it runs from a soft, leafy green through to a deep green with a faint blue undertone. Jewellers tend to rate colour first, clarity second, because a rich, even green is what makes an emerald read as an emerald.
On paper the stone is hard. It measures 7.5 to 8 on the Mohs scale, which is harder than quartz and most everyday grit. The catch is that hardness and toughness are not the same thing. Emeralds form with a lot of internal inclusions and tiny fractures, and those flaws make the stone brittle, so it can chip or crack from a sharp knock even though it resists scratching. The International Gem Society ranks emerald below many stones of similar hardness for exactly this reason. In plain terms: it's fine for a ring you wear thoughtfully, but it is not the stone to garden or wash dishes in. Most emeralds are also treated with oil or resin to fill surface-reaching fractures and improve their look, which is standard and accepted, but it does mean you avoid ultrasonic cleaners and steam.
The meaning and history of emerald
Emerald has one of the longest paper trails of any gem. Egypt mined it from around 1500 BC, and the deposits worked in Cleopatra's era supplied the ancient Mediterranean world. Since the sixteenth century, Colombia has been the source of the finest material, and Colombian emeralds still set the standard collectors measure against. Across cultures the green stone has long been associated with renewal, growth and spring, which fits its May placement neatly. The Roman writer Pliny praised it for resting tired eyes, and it has carried associations with foresight and honesty in many later traditions. None of that is a claim about the stone doing anything; it's simply the story it carries, and part of what makes an emonth gift feel meaningful.
Choosing and gifting an emerald piece
Here is where I'd give an opinion. Because emerald is brittle, the piece matters as much as the stone. For everyday wear, a pendant or a pair of earrings is the safer bet, since neither takes the daily knocks a ring does. If you want a ring, choose the setting deliberately: a bezel that wraps metal around the girdle protects the edges far better than tall, exposed prongs, and an emerald cut (the rectangular step cut named after this very stone) puts less stress on vulnerable corners than a pointed shape. A halo of small diamonds also buffers the centre stone while adding brightness that plays well against green.
Green sits beautifully against warm metal, so yellow gold is a classic pairing, but a cool white gold or platinum makes the green look crisper and more modern. If the emerald is on the lighter, softer side, a smaller accent role in a cluster can be smarter than asking one modest stone to carry a whole ring. At our Coquitlam studio we cut and set these to order, and our goldsmith will happily talk through prong versus bezel and which shape suits your stone before anything is committed. Emerald is also the traditional 20th anniversary stone, so a commission can mark a birthday and a milestone at once; if that's the occasion, our bespoke anniversary pieces are a good starting point.
Caring for a brittle stone
Emerald rewards gentle habits. Take a ring off before anything rough with your hands, store it apart from harder stones like diamond and sapphire so nothing scratches it, and clean it with warm soapy water and a soft brush rather than a machine. Skip the ultrasonic and steam cleaners entirely, because they can drive out the oil or resin used to fill fractures and leave the stone looking dull or, worse, open a crack. Every few years a jeweller can re-oil an emerald to refresh its clarity, which is a normal part of owning one. Treated kindly, an emerald keeps its green for generations, which is rather the point of choosing a birthstone in the first place.
Mark a May birthday in the right stone
Bring the month, the stone and a rough budget. Our on-site goldsmith in Coquitlam will design it with you — set a gem you already own, or build something new around your birthstone.
Prefer to talk? Call our studio at (604) 653-6449.Frequently asked questions
What is the birthstone for May?
Emerald is the only modern birthstone for May. It has been the assigned stone on the American Gem Society list since the modern list was set in 1912.
How hard is an emerald and can I wear it every day?
Emerald measures 7.5 to 8 on the Mohs scale, so it resists scratches well. But its natural inclusions make it brittle, so it can chip from a hard knock. You can wear it daily if you're mindful and choose a protective setting, but take a ring off for rough work.
Why does my emerald have marks or lines inside it?
Almost every natural emerald contains inclusions, often called the jardin. They are a normal part of the stone and help prove it is natural rather than a fault. A completely flawless emerald is rare and usually very expensive.
Are emeralds usually treated?
Yes. Most emeralds are treated with oil or resin to fill tiny surface-reaching fractures and improve clarity. This is standard and accepted in the trade. It does mean you should avoid ultrasonic and steam cleaning, which can strip the filler.
What setting is best for an emerald ring?
A bezel setting, which wraps metal around the edge of the stone, gives the best protection for a brittle gem. An emerald-cut shape also protects the corners better than pointed cuts. A diamond halo adds both protection and sparkle.
Which metal suits an emerald?
Both work. Yellow gold gives a warm, classic look against the green, while white gold or platinum makes the green appear crisper and more modern. It comes down to your own taste and skin tone.
How should I clean an emerald?
Use warm water, a little mild soap and a soft brush, then dry it gently. Never use an ultrasonic or steam cleaner, as these can remove the oil or resin used to fill the stone's fractures.
Is emerald linked to any wedding anniversary?
Yes, emerald is the traditional gift for a 20th wedding anniversary, which makes a May emerald piece a fitting choice for couples marking that milestone.
Can Vanhess make a custom emerald piece?
Yes. We design and build emerald jewellery to order at our Coquitlam studio, and our goldsmith will advise on the right setting and shape to protect the stone before you commit.