Natural vs Lab-Grown Diamonds – What’s the Difference?

A natural diamond is carbon that crystallized deep in the earth's mantle, roughly one hundred miles below the surface, under extreme heat and pressure. Most formed between one and three billion years ago and were carried closer to the surface by ancient volcanic eruptions, where they are mined today.

Because every natural diamond grew in uncontrolled conditions, each one carries its own pattern of inclusions and growth features, a record of where and how it formed. For many buyers, that geological history is part of the appeal.

Not with the naked eye, and not with a standard diamond tester, which identifies both as diamond. An experienced gemologist can tell them apart only with specialist laboratory equipment that detects tiny differences in growth patterns and trace elements.

That is why the grading report matters. Certificates from labs such as IGI and GIA state whether a diamond is natural or laboratory-grown, and many lab-grown diamonds also carry a microscopic laser inscription on the girdle that matches the report number.

The buying checklist is the same for both, because both are graded the same way.

1. Set your budget first, then decide whether size or the highest grades matter more to you.
2. Put cut first. An excellent or ideal cut does more for sparkle than any other grade.
3. Choose an eye-clean clarity. VS and many SI diamonds look clean without magnification.
4. Pick a color that suits the metal. Near-colorless grades look white, especially in yellow or rose gold.
5. Ask for the grading report from an independent lab such as IGI or GIA, and check that it states the diamond's origin.
6. See the actual stone. Ask for photos or a video of the diamond you are buying, not a stock image.

Following these steps, you will get a beautiful diamond whichever origin you choose.