Emerald

Are emeralds durable enough for daily wear?

Yes, with care and the right setting — but emeralds are more fragile than their hardness number suggests, so they need more thought than a sapphire or a diamond. The confusion comes from mixing up two different things: hardness and toughness. Hardness is resistance to scratching. Toughness is resistance to chipping and cracking. Emerald scores well on the first and poorly on the second.

On the Mohs scale, emerald sits at 7.5–8, which is genuinely hard — harder than quartz, harder than most things it'll bump into day to day. If hardness were the whole story, an emerald would be a great everyday stone. But emerald is the heavily included member of the beryl family. Its clearer cousins, aquamarine and morganite, tend to be tougher precisely because they don't carry the same internal fractures. All those tiny fissures inside an emerald are weak points, and a sharp knock against a door frame or a countertop can chip or crack the stone even though nothing scratched it.

Why emerald is more fragile than its hardness suggests

Picture a pane of glass with hairline cracks already running through it. It's hard — you can't easily scratch it — but tap it on a corner and it gives way along those existing lines. That's an emerald. The trade even has a name for how included these stones are: emerald belongs to the gem world's most heavily included clarity type, which is why a genuinely "clean" emerald is rare and expensive, and why most have visible internal features (jewellers call them the jardin, French for garden).

So the honest summary is this: an emerald in a sensible setting, worn with a bit of awareness, will serve you for decades. An emerald in a tall, exposed setting, worn while gardening or doing the dishes, is asking for trouble. If you want the colour-stone look with tougher, more knock-resistant durability, it's worth comparing emerald against a sapphire or a ruby — both rate Mohs 9 with excellent toughness — or reading our wider guide to alternative engagement-ring stones.

Almost every emerald is treated

This surprises people, so we say it plainly: the great majority of cut emeralds have had their fractures filled to improve clarity. GIA notes that some estimates put the share of fracture-filled emeralds at 90 percent or more, and the practice — studied in detail in GIA's classification of emerald clarity enhancement — is long-established and accepted in the trade. Historically the filler was natural cedarwood oil; today resins are common too. The filler seeps into surface-reaching cracks, so light passes through more evenly and the fractures become much less visible.

A few things to know. First, treatment is about appearance, not strength — filling a fracture makes it harder to see, but it does not make the stone tougher. Second, oil treatments aren't permanent. Heat, harsh cleaning, or just time can cause oil to dry out or leach, and the fractures reappear. The good news is an oiled emerald can usually be re-oiled by a goldsmith. Resin treatments tend to last longer but are much harder to reverse. Third, a reputable seller discloses treatment. Ask, and ask whether it's oil or resin — it changes how the stone should be cared for over its life.

Emerald vs other coloured stones at a glance

Same hardness as aquamarine, but the inclusions are what drop emerald's everyday rating. Hardness alone never tells you how a stone behaves on a hand. Our full Gemstone Guide: durability, colour and care, stone by stone lays this out for every popular stone.

How to set and care for an emerald

The setting matters more for emerald than for almost any other stone. On our bench in Coquitlam we steer emerald buyers toward protection: a bezel that wraps metal around the girdle, or a setting with sturdy prongs and a lower profile so the stone doesn't catch on things. Designs that leave the emerald's edges exposed look lovely but invite chips. If it's going into an engagement ring — a piece worn every single day — protection wins over drama.

For cleaning, follow GIA's emerald care guidance: warm water, mild dish soap, and a soft brush. That's it. Never use an ultrasonic cleaner or a steamer — the vibration can extend existing fractures, and the heat can sweat the oil or resin right out of the stone, undoing the treatment. Avoid solvents, harsh household cleaners, and prolonged heat. Take the ring off before the gym, the garden, and the kitchen sink. Every few years, have a jeweller check the setting and, if it's an oiled stone that's looking tired, re-oil it. Our on-site goldsmith does this routinely.

Emerald as the May birthstone

Emerald is the birthstone for May, and that green is its whole appeal — a pure, slightly bluish green with a depth you don't get from any other stone. Colour is what you pay for in an emerald; clarity comes second, which is the reverse of how diamonds are graded. If you want emerald colour without the fragility worry, lab-grown emeralds exist and are chemically identical, often with fewer fractures. And if it's the green you love but you want a tougher, harder stone for rough daily wear, a green sapphire or even a coloured moissanite can be worth a look.

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