Yes, a 3 carat lab-grown diamond can certainly be made into a ring. Lab-grown diamonds have the same physical, chemical, and optical properties as natural diamonds, and they can be cut, shaped, and set into jewelry just like natural diamonds.
When creating a ring with a lab-grown diamond, the diamond can be selected based on its size, cut, color, and clarity, just like you would with a natural diamond. Once the diamond is chosen, it can be set into a ring setting of your choice, which could be made from various precious metals such as gold, platinum, or silver.
Lab-grown diamonds have become increasingly popular in recent years due to their ethical and environmental considerations, as well as their cost-effectiveness compared to natural diamonds. Many jewelers offer a wide range of options for creating custom rings using lab-grown diamonds, allowing you to design a unique and beautiful piece of jewelry.