Is it easy to tell the differerence between a lab-grown diamond and natural diamond?

In general, it can be difficult for even a trained gemologist to tell the difference between a lab-grown diamond and a natural diamond without the use of specialized equipment. This is because lab-grown diamonds are chemically, physically, and optically identical to natural diamonds. However, there are a few ways to differentiate between the two:

Look for a certificate or grading report: Most lab-grown diamonds are accompanied by a certificate or grading report that states that they are man-made. Natural diamonds will not have this documentation.

Check for fluorescence: Some natural diamonds exhibit fluorescence, or a glowing effect, when exposed to ultraviolet light. Lab-grown diamonds do not typically fluoresce.

Use a microscope: A microscope with at least 30x magnification can help to reveal any subtle differences between a lab-grown diamond and a natural diamond. Lab-grown diamonds may have more regular, geometric patterns in the crystal structure, while natural diamonds may have more irregular patterns.

It's important to note that these methods are not foolproof, and the only way to definitively tell the difference between a lab-grown diamond and a natural diamond is through advanced laboratory testing. If you are concerned about being able to tell the difference, you may want to consider purchasing a lab-grown diamond from a reputable dealer who can provide a certificate of authenticity.