IGI Certified · Laboratory-Grown · 360° Video on Every Stone · Free Insured US Shipping · IGI Certified · Laboratory-Grown · 360° Video on Every Stone · Free Insured US Shipping · IGI Certified · Laboratory-Grown · 360° Video on Every Stone · Free Insured US Shipping · IGI Certified · Laboratory-Grown · 360° Video on Every Stone · Free Insured US Shipping ·

Certified lab-grown diamonds,
auctioned live. Shop anytime.

Every stone is laboratory-grown, IGI-certified, and shown in 360° video. What you see is the exact stone you receive.

Design your own ring →
All shapesAsscherCushionCushion modifiedCusqEmeraldHeartMarquiseOtherOvalPearPrincessRadiantRound
1.03ct Marquise E VS2 IGI-certified lab-grown diamond
1.06ct Marquise E VS2 IGI-certified lab-grown diamond
1.06ct Marquise · E VS2
IGI 772652878 · 10.28×5.35×3.39mm
1.06ct Marquise E VS2 IGI-certified lab-grown diamond
2ct Marquise E VS2 IGI-certified lab-grown diamond
2.04ct Marquise E VS2 IGI-certified lab-grown diamond
2.04ct Marquise · E VS2
IGI 762551205 · 13.58×6.47×4.15mm
3ct Marquise E VS2 IGI-certified lab-grown diamond
3ct Marquise · E VS2
IGI 750553131 · 15.29×7.39×4.74mm
3.02ct Marquise F VVS2 IGI-certified lab-grown diamond
3.1ct Marquise F VVS2 IGI-certified lab-grown diamond
3.1ct Marquise · F VVS2
IGI 747590485 · 14.57×7.51×4.84mm
4.01ct Marquise F VVS2 IGI-certified lab-grown diamond
4.01ct Marquise · F VVS2
IGI 812617598 · 16.51×8.35×5.14mm
$1,441Buy now
5.08ct Marquise E VS2 IGI-certified lab-grown diamond
5.08ct Marquise · E VS2
IGI 707558462 · 17.93×8.95×5.62mm
$1,313Buy now
6.2ct Marquise E VS2 IGI-certified lab-grown diamond
6.2ct Marquise · E VS2
IGI 707520882 · 19.95×9.51×5.84mm
$1,466Buy now

Looking for something specific?

Beyond what we auction live, browse thousands more certified natural & lab-grown diamonds — every shape, size and budget, shipped fully insured.

Browse the full collection →

That's what we guarantee

All diamonds sold by Matts Diamonds are laboratory-grown (man-made) diamonds — chemically and optically identical to mined diamonds, conflict-free, and independently graded by IGI. Every listing links to its verifiable IGI report and a 360° video of the exact stone. Free insured shipping within the USA.

What buyers say

Bought from us? We'd love to hear how it went.

Frequently asked questions

Are lab-grown diamonds real diamonds?

Yes. Laboratory-grown diamonds are chemically, physically, and optically identical to mined diamonds — they are real diamonds, simply grown in a lab rather than mined. Every stone from Matts Diamonds is independently graded by IGI.

What does IGI-certified mean?

IGI (the International Gemological Institute) is an independent laboratory that grades each diamond's carat, color, clarity, and cut. Every listing links to its verifiable IGI report so you can confirm the grading yourself.

Will I receive the exact diamond shown?

Yes. Each listing shows the specific stone you will receive, along with a 360° video and its own IGI report — not a stock photo.

How do the live auctions work?

Stones are auctioned live on TikTok (@matsdiamonds), and the full collection is also available to shop anytime here on the site.

How is shipping handled?

Diamonds ship with free insured shipping within the USA, and you can track your order anytime from the Track my order page.