A blue lab-grown diamond is a diamond with a blue color that is grown through a specific method. They are not naturally formed but are cultivated through artificial processing or specific growth conditions. Pink lab-grown diamonds are created through various methods, often including radiation treatment, chemical vapor deposition (CVD), and other specific growth processes.

During the manufacturing process, high-quality diamonds may be selected as starting materials and placed in an irradiation chamber. Through the action of radioactive substances or high-energy radiation sources, they undergo a series of ion bombardments and collisions, thereby changing the color of the diamonds. In addition, diamonds with a blue color can also be grown through specific growth conditions or the addition of specific elements.