Do lab grown diamonds change color over time?
No. A quality lab-grown diamond does not change color over time. It is chemically and optically identical to a mined diamond — pure crystallized carbon — and is one of the hardest, most stable materials on earth. Any apparent color shift almost always comes from surface dirt, damaged plating on the setting, or, in rare cases, a diamond simulant sold as the real thing rather than a genuine certified lab-grown stone.
Because lab-grown diamonds are still relatively new to many shoppers, a common worry is whether they will fade, yellow or cloud over the years the way some gemstone imitations do. The reassuring answer is that a certified lab-grown diamond is every bit as permanent as a natural one.
Why lab-grown diamonds stay stable
Lab-grown diamonds are created through High Pressure High Temperature (HPHT) or Chemical Vapor Deposition (CVD) processes that reproduce the conditions under which natural diamonds form. The result is real diamond: the same carbon crystal structure, the same 10 on the Mohs hardness scale, and the same resistance to heat, light and everyday chemicals. Color in a diamond comes from its atomic structure and trace elements locked in during growth, not from a coating that can wear away — so it does not drift over time. Learn more on our lab-grown diamonds page.
So why might a diamond look different later?
When a ring seems to have changed color, the diamond itself is rarely the cause. The usual culprits are:
- Everyday buildup — lotion, soap and skin oils form a film that dulls sparkle and can add a grayish or yellowish cast until the stone is cleaned.
- Setting wear — white gold is plated with rhodium, which gradually wears and lets the warmer metal beneath show through, making the diamond look less white by contrast.
- Simulants, not diamonds — materials such as cubic zirconia or moissanite are not diamond and can cloud or discolor; this is why buying a certified stone matters.
- Damaged treatments — a small number of stones receive post-growth treatments; a reputable, certified diamond will disclose any treatment up front.
How certification protects you
An independent grading report from a respected laboratory such as GIA or IGI confirms that your stone is a genuine lab-grown diamond and records its color and clarity grade. That documented baseline means you can always verify the stone has not been swapped or misrepresented. Every lab-grown diamond we offer is certified — see how they compare with mined stones on our natural vs lab-grown price comparison, and read the basics in our beginner's guide to lab-grown diamonds.
Keeping your diamond bright
- Soak the piece in warm water with a little mild dish soap, then brush gently with a soft toothbrush and rinse.
- Avoid harsh chemicals, chlorine and abrasive cleaners that can attack the metal setting.
- Have the setting checked and, if needed, re-rhodium plated every year or two.
- Store pieces separately so stones do not scratch softer metals.
For the fundamentals of color, clarity, cut and carat, our diamond education guide is a helpful companion, and you can see certified stones set in our engagement rings and pendants and necklaces.
Frequently asked questions
Will a lab-grown diamond yellow with age?
No. Its color is fixed by its crystal structure at the time of growth and does not yellow or fade with age. Any yellowing appearance is due to surface dirt or a worn setting, both of which are easily remedied.
Do lab-grown diamonds cloud over time?
Genuine certified lab-grown diamonds do not cloud. Clouding is associated with diamond simulants such as cubic zirconia, which are not real diamonds.
Are lab-grown diamonds as durable as natural ones?
Yes. They share the same hardness (10 on the Mohs scale) and durability as mined diamonds, making them ideal for daily wear.
Explore certified, color-stable stones across our lab-grown diamond collection.
