The reason natural diamonds are so pricey is that their existence depends on complex and expensive mining operations with heavy uncertainty about the quality of the product. It is believed that a finite amount of natural diamonds are present on the earth's surface, and the circumstances under which each is created are unique.
lab-grown diamonds are strategically created under a controlled lab environment, which is almost similar to all diamonds.
There is no complex extraction process involved either. These factors make them less expensive than natural diamonds, sometimes by up to 50 percent less than their natural counterparts.
With the advancement in technology, the process of creating lab grown diamonds is supposed to get more efficient and cost-effective.
There are diamond color gradings agencies, like the Gemological Institute of America and the International Gemological Institute, which grade lab-created diamonds using the same methods and standards used for natural diamonds.
Therefore, a lab made diamond and a natural diamond of the same 4Cs—cut, clarity, color, and carat—have no difference at all.
However, it'll be wrong to assume that lab made diamonds will have comparatively better 4Cs than natural diamonds.
As lab-grown diamonds are grown and not built, they will also take on the flaws, called inclusions, that affect a diamond's sparkle. The more inclusions in a diamond, the cloudier it becomes, and thus lower the clarity grade.