Diamond

At 10 on the Mohs scale, nothing resists scratching better than a diamond. That means the crisp facet edges and bright polish you see on day one are the same ones you’ll still see a lifetime later.

That doesn’t make it invincible, though — diamonds have perfect cleavage, which means a sharp, well-placed impact (usually on a corner) can chip it. But it’s still the most durable, low maintenance, and everyday wearable gemstone there is. It's why they’ve been the go-to engagement ring stone for centuries.

And if the idea of a traditional white brilliant diamond doesn't feel like you, there’s a whole delicious world of alternative diamonds – think champagne diamonds with golden warmth, antique cuts with chunky facets, romantic rose cuts, colored diamonds, portrait cuts, and old mine cushions with that candlelit sparkle. Same durability — more personality.

Lab diamonds sit in the exact same durability category. They’re chemically and structurally identical to natural diamonds, which means the same hardness, same resistance to scratching, same long-term wearability. The main differences: they're grown in lab vs nature-made and they're much less expensive.  

Read our full guide to natural diamonds vs lab diamonds here.

Sapphire + Ruby (Corundum)

Sapphire and ruby are both corundum — the same mineral with wildly different color personalities. When it comes to durability, this family is hard to beat.

At 9 on the Mohs scale, corundum resists scratching extremely well. It also has strong toughness and no true cleavage, meaning there aren’t built-in splitting planes waiting for the wrong angle.

This is why sapphires work so well as engagement rings. And the colors are endless: teals that shift like deep water, Montana stones with that wild, open-sky energy, pink sapphires with cotton candy realness, classic royal blues worthy of crown jewels.

Ditto for rubies – same structure, same resilience, just a different mood. Saturated, velvety, decadent, and entirely capable of handling daily wear.

Chrysoberyl

Chrysoberyl doesn’t get the hype sapphire does, but in terms of durability, it’s sitting right there.

At 8.5 on the Mohs scale, it’s harder than spinel, tourmaline, or tanzanite, and just a step below corundum. It resists scratching well, and it doesn’t have the cleavage lines that make some stones more vulnerable to chipping.

The color radiates golden warmth — rich honey, deeper olive, sometimes that unexpected flash of green that surprises you when the light shifts. It’s especially sunlit in yellow or peach gold settings.

If you want an uncommon gem that will truly last, chrysoberyl is one of the most underhyped yet incredible warm-toned stones around.

Spinel

Spinel is one of the most slept-on durable gemstones in fine jewelry — which is wild considering it's durability, price, and irresistible array of colors.

At 8 on the Mohs scale, it’s plenty hard enough for everyday wear, plus has strong toughness and — importantly — no true cleavage, meaning it handles impact well. It’s also usually untreated, which helps with long-term stability.

Color is where spinel really shines. Ruby-like reds so saturated they fooled royalty for centuries, electric pinks that feel alive, inky cobalt blues, smoky violets, and deep purples that shift in the sunlight.

If you’re looking for a durable colored gemstone that’s less expensive than sapphire, spinel may be your perfect match.  

What’s the Most Durable Gemstone Besides Diamond?

If you want the most durable non-diamond stone, sapphire and ruby are the next best thing. They score a 9 on the Mohs scale, are very tough, and are made for everyday wear.

Spinel and chrysoberyl are also very strong, underhyped gems perfect for engagement rings that will actually be lived in.

Topaz

At an 8 on the Mohs scale, topaz is reasonably hard, but it has perfect cleavage — and that’s the detail that takes it from 'wear with ease' to 'wear with care'.

Under a sharp impact, especially along a cleavage plane, topaz can split cleanly. This is where shape and setting become important. Thin points, exposed corners, and high settings increase risk, while a bezel and low-profiel setting can make a big difference.

Topaz can absolutely work in a ring, particularly for someone who’s mindful with their jewelry. We just wouldn’t place it in a super low-maintenance category like some others.

Emerald

Emerald sits around 7.5–8 on the Mohs scale, which is a good start, but that number doesn’t tell the whole story.

Most emeralds are filled with natural inclusions. That mossy, garden-like interior is part of their magic, but it also means the stone can be more vulnerable to chipping. Emerald also has distinct cleavage, so a strong hit in the wrong direction can cause it to split.

Then there’s treatment — most emeralds are enhanced with oil or resin to improve clarity. It’s standard practice in the gem world, but it does affect long-term care. Ultrasonic cleaning is usually off the table, and high heat during resizing requires caution. Over time, re-oiling may be necessary.

Still — that deep, saturated green has been turning heads for centuries for a reason. Emerald can absolutely live in a daily ring, it just needs a little more protection and a wearer who knows when to give it a break.

If you love that rich emerald green hue but want something more durable, look at green sapphires which come in an endless array of green and teal hues, have higher clarity, and are much more durable.

Moonstone

Moonstone’s glow is dreamy for a reason — that soft, floating light (called adularescence) seems to hover just beneath the surface.

But moonstone is part of the feldspar family, and durability is where the romance meets reality. It sits around 6–6.5 on the Mohs scale and has perfect cleavage in two directions. That combination means it scratches more easily and can chip along those internal planes if it's hit in the wrong spot.

Over time, constant friction will scratch its surface. The polish that makes moonstone look glassy and luminous can gradually dull, and once that happens, the glow doesn’t hit the same way.

This isn’t a stone that thrives under constant wear. In a daily, never-remove engagement ring, visible wear can happen fast. Moonstone works best in rings that are worn intentionally and given breaks — not in rings expected to take years of nonstop impact.