How Long Do Lab Grown Diamonds Last?

One of the most common questions about lab grown diamonds is whether they last as long as mined ones, or whether they fade, cloud, or wear out over time. It is a fair concern when you are investing in an engagement ring or heirloom piece. The short answer is reassuring: a lab grown diamond lasts forever, exactly like a diamond formed in the earth.

In short: Lab grown diamonds last a lifetime and beyond. They are chemically and physically identical to mined diamonds, scoring a perfect 10 on the Mohs hardness scale, so they do not fade, cloud, discolor, or lose sparkle with age. There is no expiration date and no gradual deterioration. With the same basic care you would give any fine diamond jewelry, a lab grown stone will look as brilliant in fifty years as it does today, and can be passed down through generations.

Why lab grown diamonds are permanent

A lab grown diamond is pure carbon arranged in the same rigid crystal lattice as a mined diamond. That structure is what makes diamond the hardest known natural material, and it is identical regardless of whether the stone grew over billions of years underground or over weeks in a reactor. Because the material is the same, the durability is the same. This is confirmed by the fact that lab grown stones are chemically the same as natural diamonds in every measurable way.

Hardness and everyday durability

On the Mohs scale of mineral hardness, diamond sits at the very top with a score of 10, meaning nothing in normal daily life can scratch it except another diamond. This makes lab grown diamonds an excellent choice for rings worn every day. That said, hardness is not the same as toughness: like any diamond, a lab grown stone can chip if struck hard at a vulnerable angle, so a secure setting and sensible care still matter. Our deeper look at lab grown durability covers this in more detail.

Do lab grown diamonds fade or cloud?

No. This is a persistent myth. A lab grown diamond does not yellow, cloud, or lose its fire over time. What can happen to any diamond, mined or grown, is that a film of skin oils, lotion, and dust builds up on the surface and dulls its sparkle temporarily. A simple clean restores it completely. There is no chemical process by which the diamond itself degrades.

How to keep your diamond brilliant

• Clean regularly: soak in warm water with a little mild dish soap, gently brush with a soft toothbrush, and rinse. See our at-home cleaning guide.
• Remove for rough tasks: take rings off for heavy lifting, gardening, or gym sessions to protect both stone and setting.
• Store separately: keep diamond pieces apart so they do not scratch other jewelry (or each other).
• Check the setting periodically: have a jeweler inspect the prongs once a year to ensure the stone is held securely.

A lasting choice for engagement rings

Because they last indefinitely and cost far less than mined diamonds of comparable quality, lab grown stones are an ideal choice for engagement rings meant to be worn for a lifetime. You get the permanence and symbolism of a diamond, plus the option to size up or invest the savings elsewhere. If you want to understand the quality factors behind a long-lasting, brilliant stone, start with our diamond education hub.

Frequently asked questions

Do lab grown diamonds have an expiration date? No. They are permanent and do not degrade, expire, or wear out.

Will a lab grown diamond still sparkle in 20 years? Yes, with routine cleaning it will look exactly as brilliant as the day you bought it.

Can lab grown diamonds be passed down as heirlooms? Absolutely. They are as durable and permanent as mined diamonds and can be inherited or reset into new designs for future generations.

Explore our certified lab grown diamonds and engagement rings to find a piece built to last a lifetime.