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Round|Lab Grown|GIA

0.40ct H SI1 Round Lab Grown Diamond

EX • H/SI1 • GIA 6262737411

Certificate GIA 6262737411

Diamond specifications and retailer prices

From £369 GBP
As of October 31, 2026
Save £290 GBP (44%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £659 GBP at MOH London · As of October 26, 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 H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6262737411. Listed at 3 retailers as of October 26, 2026, with prices from £369 to £659, a £290 spread on the same certified stone. MOH London lists it at £659. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

0.40
Carat
H
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabGIA
CertificateGIA 6262737411
Dimensions4.72 × 4.68 × 2.94 mm
L/W Ratio1.01
Top View
4.72 mm4.68 mm0.40 ctH / SI1
OriginLab Grown
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateGIA 6262737411
Side View
Table 57.0%CrownGirdlePavilionCulet: NoneDepth 62.6%

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: Oct 31
Current: £659 GBP|Low: £343 GBP|High: £665 GBP|Avg: £495 GBP|+1.9%
MOH London
Retailer 2
Retailer 3
Retailer 4
October 31, 2026
Retailer 2£369 GBP
Retailer 3£446 GBP
Retailer 4£506 GBP
MOH London£659 GBP

41 data points across 4 retailers

3 retailers£369 GBP to £659 GBP

B
Cheapest Retailer
-
£369 GBP
B
Retailer 2
-
£446 GBP
€569 EUR
View
Most Expensive
B
MOH London
B2DB2920E · Oct 26
£659 GBP
View
2 more retailers have this diamond
Prices start from £369 GBPSave up to £290 GBP

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
£369 GBP