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Round|Lab Grown|GIA

0.40ct G SI1 Round Lab Grown Diamond

EX • G/SI1 • GIA 2166230154

Certificate GIA 2166230154

Diamond specifications and retailer prices

From £382 GBP
HK$4,000 HKD
As of October 30, 2026
Save £540 GBP (59%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £922 GBP at MOH London · As of October 29, 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 G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2166230154. Listed at 6 retailers as of October 29, 2026, with prices from £382 to £922, a £540 spread on the same certified stone. MOH London lists it at £922. 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
G
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabGIA
CertificateGIA 2166230154
Dimensions4.70 × 4.74 × 2.94 mm
L/W Ratio1.01
Top View
4.70 mm4.74 mm0.40 ctG / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2166230154
Side View
Table 58.0%CrownGirdlePavilionCulet: NDepth 62.3%

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 30
Current: £922 GBP|Low: £336 GBP|High: £942 GBP|Avg: £538 GBP|-0.9%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 31, 2026
Retailer 4£336 GBP
Retailer 5£382 GBP
Retailer 2£496 GBP
Retailer 3£536 GBP
Retailer 6£606 GBP
MOH London£922 GBP

40 data points across 6 retailers

6 retailers£382 GBP to £922 GBP

Retailer 1
-
£336 GBP
$450 USD
Price last confirmed 15 days ago
B
Retailer 2
-
£382 GBP
HK$4,000 HKD
View
B
Retailer 3
-
£496 GBP
View
B
Retailer 4
-
£536 GBP
€684 EUR
View
Retailer 5
-
£606 GBP
A$1,249 AUD
View
Price last confirmed 26 days ago
Most Expensive
B
MOH London
2604BECF3 · Oct 29
£922 GBP
View
5 more retailers have this diamond
Prices start from £382 GBPSave up to £540 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
£382 GBP