Lab-Grown Diamonds: Are They the Same as Real Diamonds?
Yes — lab-grown diamonds are real diamonds. They have the identical chemical composition (pure crystallized carbon), the same hardness (a perfect 10 on the Mohs scale) and the same optical brilliance as mined diamonds. The only genuine difference is origin: one grows in the earth over billions of years, the other in a lab over weeks. Even trained gemologists need specialized equipment to tell them apart.
“Real” is the word people reach for, but the more precise question is whether lab-grown diamonds are the same material as mined diamonds. They are. Here is exactly why, and what does and doesn’t differ.
Chemically and physically identical
A diamond is pure carbon arranged in a specific crystal structure. Lab-grown diamonds share that exact structure, which is why they behave identically — same hardness, same refractive index, same fire and sparkle. This is what separates them from diamond simulants like cubic zirconia or moissanite, which only imitate the look. Our diamond education hub explains the science in more detail.
What actually differs
- Origin: grown in a lab (via CVD or HPHT) rather than mined from the earth
- Inclusion types: lab-grown stones can show slightly different microscopic features
- Price: lab-grown diamonds typically cost 60–80% less than mined equivalents
- Traceability: a lab-grown diamond’s origin is fully known
None of these affect how the diamond looks or wears on your hand. They do affect what you pay — see the numbers on our natural vs lab-grown price comparison.
How you can be sure
Reputable lab-grown diamonds are graded by the GIA and IGI on the same 4Cs scale as mined stones, and the report states clearly that the diamond is laboratory-grown. That certification is your guarantee of exactly what you are buying. Browse certified stones across our lab-grown engagement rings and the full engagement ring collection.
Frequently asked questions
Are lab-grown diamonds fake?
No. They are genuine diamonds, chemically and physically identical to mined ones. Only simulants such as cubic zirconia or moissanite are not true diamonds.
Can a jeweler tell a lab-grown diamond from a mined one?
Not by eye. Distinguishing them requires specialized laboratory equipment, which is why certification matters.
Do lab-grown diamonds last as long as mined diamonds?
Yes. With the same hardness and durability, a lab-grown diamond will last a lifetime and beyond with normal care.
For a deeper dive, see our piece on whether lab-grown diamonds are chemically the same as natural diamonds.
