Yes, lab-grown diamonds last over time. They are chemically, physically, and optically identical to mined diamonds. The only difference is the point of origin. Mined diamonds are formed inside the earth's surface, while lab-grown diamonds are created in the laboratory.
Lab-grown diamonds last long because they are chemically identical to mined diamonds. They are made of pure carbon, which is a very hard material with a Mohs hardness rating of 10. This means that they are very resistant to scratching and chipping.