Collection: May Birthstone Jewelry

What emerald actually is

Emerald is beryl — the same mineral as aquamarine, coloured green by chromium or vanadium instead of iron. It sits at 7.5–8 on the Mohs scale, which sounds durable, and in one sense is. Hardness and toughness are different things, though, and emerald is the standing example of why that distinction matters.

Nearly all emerald contains internal fractures and inclusions. The trade calls them jardin — garden — because they look like foliage suspended in the stone, and they are considered characteristic rather than a flaw. A completely clean emerald is so rare it invites suspicion. But those fractures mean emerald chips and cracks more readily than its hardness number suggests.

Almost all emerald is also oiled or resin-filled to reduce the visibility of those fractures. This is standard, disclosed industry practice going back centuries. It is also the reason emerald must never go near an ultrasonic cleaner — it strips the filling and the stone looks worse afterwards.

Why May gets it

Emerald's traditional associations are love, patience and truthfulness, and it has been the anniversary stone for so long that it now carries as much weight for couples as for May birthdays. Older sources credit it with revealing lies and with soothing the eyes — the second of which is at least plausible, given the colour.

It sits at the heart, the tender register rather than the open one. Where peridot's heart energy is lightness, emerald's is commitment: staying, repairing, choosing the same thing again. The kind of loyalty that shows up on an ordinary Tuesday rather than a dramatic one.

May is also the month everything finally turns green here, so the timing is not subtle.

Genuine, lab-created and look-alikes

Fine natural emerald is among the most expensive gems in the world, so this is a month where the material question genuinely matters.

Lab-created emerald is real beryl — same chemistry, same colour mechanism, grown rather than mined, and typically cleaner than natural stone because it has not spent millions of years being compressed. Green glass, dyed quartz and green cubic zirconia also appear widely in "emerald" jewellery elsewhere.

Every listing here states which it is: genuine, lab-created, or a look-alike standing in for the colour. A look-alike is never described as emerald.

Wearing and caring for it

Green is a strong, saturated colour and reads richest against gold. Silver cools it and makes it sharper and more contemporary. It is a colour that carries an outfit rather than accessorising it.

Care: warm water, mild soap, soft cloth, dried straight away. No ultrasonic, no steam, no harsh detergent — all three attack the oil or resin. Take rings off for anything physical. Full routine in the crystal care guide, and the longer read is in the May emerald guide.