Lab-grown diamonds, also known as man-made or created diamonds, offer an alternative to traditional mined diamonds. They are produced in a laboratory setting, thereby avoiding the negative impacts of diamond mining on both humans and the environment. MARLII LAB uses diamonds that have been sustainably grown in a zero-emissions laboratory located in Belgium.

These diamonds are indistinguishable from mined diamonds, possessing the same optical, physical, and chemical properties. They are formed in a similar process, with carbon atoms placed under high temperature and immense pressure to create a crystalline lattice structure. Once fully formed, the diamonds are cut and polished to reveal their maximum brilliance. Lab-grown diamonds come in a variety of color and clarity grades and are unique, much like mined diamonds.

Lab-grown diamonds and mined diamonds are virtually indistinguishable to the untrained eye. Even seasoned gemologists often struggle to differentiate between the two, as they are alike in both appearance and chemical composition. Any slight variations are not indicative of quality and are often only noticeable through advanced analysis performed by specially trained gemmologists.