Will Moissanite Last Forever? An Honest Durability Guide

Last updated July 2026

This is one of the most common hesitations we hear about moissanite: is it genuinely built to last, or is it a placeholder until someone can afford a diamond? Short answer: moissanite is a genuine forever stone. Here's the actual physical case for that, including a detail about toughness that most guides get backwards.

What Actually Makes a Stone "Forever"?

A gemstone built to last a lifetime needs to be:

• Hard enough to resist scratching and abrasion
• Tough enough to survive daily impacts without chipping or cracking
• Optically stable, holding its brilliance for decades
• Chemically and thermally resilient

Moissanite performs genuinely well against all four, though the details are more interesting than a simple hardness number suggests.

Hardness: 9.25 on the Mohs Scale

Moissanite scores 9.25, the second-hardest gemstone used in fine jewellery after diamond, which scores a perfect 10. For context:

• Sapphire: 9
• Emerald: 7.5–8
• Quartz (common household dust): 7

This matters more than the number alone suggests: moissanite is harder than virtually everything it will encounter in daily life, meaning genuine scratching is extremely rare. It won't cloud, dull, or degrade under normal conditions.

Toughness: Where Moissanite Actually Has an Edge

Hardness and toughness are different properties, hardness measures resistance to scratching, toughness measures resistance to chipping or cracking under impact. This is where the comparison gets genuinely interesting, and where a lot of guides get it backwards.

Diamond has perfect cleavage in four directions, meaning its crystal structure includes internal planes along which it can split if struck at the right angle, despite being the hardest material on Earth. Moissanite has no defined cleavage plane. That structural difference means moissanite is generally more resistant to chipping from a sharp, precisely angled impact than diamond is, a genuine advantage, not just a consolation prize for being slightly less hard.

To be clear about what this does and doesn't mean: both stones handle daily wear exceptionally well, and setting quality matters more than either stone's inherent toughness in preventing real-world damage. But if you've heard that diamond is unambiguously "tougher" than moissanite, that's an oversimplification, the full picture is more nuanced, and moissanite comes out of it looking genuinely strong.

Is Moissanite Durable for Everyday Wear?

Yes, comfortably. Moissanite is:

• Heat-resistant and chemically stable
• Not brittle in any way that affects daily wear
• Unaffected by moisture, light, or normal temperature changes

As with any fine jewellery, sensible care still applies, remove it for heavy manual labour, gym sessions involving weights or grip equipment, and exposure to harsh chemicals like chlorine, not because moissanite is fragile, but because any ring benefits from basic precaution.

Does Moissanite Lose Its Sparkle Over Time?

No, this is one of the most persistent myths worth retiring. High-quality moissanite doesn't go cloudy, yellow, or fade under normal conditions, its crystal structure is chemically stable and doesn't degrade with age. If a moissanite ring looks duller than it used to, it's almost always surface buildup from oils and lotions, not the stone itself changing. Clean it and the brilliance returns.

To keep it performing at its best:

• Clean regularly with warm water and a soft brush
• Avoid harsh chemicals, bleach and chlorine specifically
• Use a jewellery cloth or ultrasonic cleaner periodically

One nuance worth knowing: if your moissanite is a crushed ice cut specifically, it's more sensitive to oil and dirt buildup than a brilliant cut, and benefits from slightly more frequent cleaning to stay looking its best. We've covered this in full in our Brilliant vs Crushed Ice guide.

Moissanite vs Diamond: Which Actually Lasts Longer?

In practical terms, for day-to-day engagement ring wear, both stones perform exceptionally well, and most people will never notice a durability difference over a lifetime. Diamond retains its edge in raw scratch resistance; moissanite holds a genuine, lesser-known edge in impact resistance. Neither claim about "which lasts longer" tells the whole story in isolation.

So, Will It Last Forever?

Yes, moissanite is a genuine lifelong stone, not a starter stone or a placeholder. Couples increasingly choose it as their actual forever stone, not a temporary compromise, because it's:

• Genuinely brilliant, with more fire than diamond
• Fully traceable and conflict-free
• Exceptionally strong for daily wear, in both hardness and impact resistance
• Excellent value for a large, high-clarity stone

Tips for Longevity

• Choose a protective setting for an active lifestyle, bezel or half-bezel settings shield the stone's edges particularly well
• Clean at home every one to two weeks with warm water and a soft brush
• Get it professionally checked annually, this protects the setting and prongs as much as the stone itself
• Store it properly in a soft pouch or lined box when not worn

Regular care protects the metal and setting as much as the stone, a ring is a system, not just a gem.

Built for Forever at VYOR Diamond Lab

We set moissanite at D colour, VVS1 clarity exclusively, in platinum or 14K/18K gold, with the setting quality to match the stone's genuine longevity. Nikolett and I are happy to talk through setting choices specifically suited to your lifestyle, since that's genuinely as important to long-term durability as the stone itself.

Frequently Asked Questions

Does moissanite chip more easily than diamond? Less easily in some respects. Diamond has four cleavage planes, structural weaknesses that can cause chipping from a precisely angled impact despite its superior hardness. Moissanite has no defined cleavage plane, giving it a genuine advantage in resisting that specific type of damage.

Does moissanite get cloudy over time? No, this is a myth. High-quality moissanite doesn't cloud, yellow or fade under normal wear. Dullness is almost always surface buildup from oils and lotions, easily resolved with cleaning.

Is moissanite hard enough for an engagement ring worn every day? Yes. At 9.25 on the Mohs scale, it's harder than sapphire, ruby and virtually everything it will encounter in daily life, and genuinely suited to decades of daily wear.

How often should I clean my moissanite ring? Every one to two weeks at home with warm water and a soft brush, with a professional clean and check annually. Crushed ice cuts benefit from slightly more frequent cleaning than brilliant cuts.

Is moissanite just a placeholder until I can afford a diamond? Not for most buyers today. It's chosen as a genuine, permanent stone by couples who value its brilliance, durability and traceable sourcing on its own merits, not as a compromise.

Explore our Moissanite Engagement Ring Collection, or book a consultation at our Wembley showroom to see why moissanite is built for forever.