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Round|Lab Grown|GIA

0.40ct F SI1 Round Lab Grown Diamond

VG • F/SI1 • GIA 6241929391

Certificate GIA 6241929391

Diamond specifications and retailer prices

From $558 USD
£439 GBP
As of November 2, 2026
Save $473 USD (46%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: $1,031 USD at MOH London · As of November 1, 2026
View at MOH London

About this 0.4ct lab-grown round diamond

This 0.4ct lab-grown round sits in the sub-half-carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by GIA 6241929391. Listed at 3 retailers as of November 1, 2026, with prices from $558 to $1,031, a $473 spread on the same certified stone. MOH London lists it at $1,031. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

0.40
Carat
F
Color
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
OriginLab Grown
Grading LabGIA
CertificateGIA 6241929391
Dimensions4.56 × 4.64 × 2.98 mm
L/W Ratio1.02
Top View
4.56 mm4.64 mm0.40 ctF / SI1
OriginLab Grown
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 6241929391
Side View
Table 54.0%CrownGirdlePavilionCulet: NoneDepth 64.8%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: $1,031 USD|Low: $535 USD|High: $1,097 USD|Avg: $753 USD|-4.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
November 2, 2026
Retailer 2$558 USD
Retailer 3$690 USD
Retailer 4$750 USD
MOH London$1,031 USD

39 data points across 4 retailers

3 retailers$558 USD to $1,031 USD

B
Cheapest Retailer
-
$558 USD
£439 GBP
B
Retailer 2
-
$690 USD
€657 EUR
View
Most Expensive
B
MOH London
C0AE144D9 · Nov 1
$1,031 USD
£812 GBP
View
2 more retailers have this diamond
Prices start from $558 USDSave up to $473 USD

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

B
0.40ct Round
$558 USD