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Round|Lab Grown|GIA

0.40ct H SI1 Round Lab Grown Diamond

VG • H/SI1 • GIA 2557262584

Certificate GIA 2557262584

Diamond specifications and retailer prices

From €569 EUR
As of November 1, 2026
Save €143 EUR (20%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: €1,773 EUR 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 very-good cut grade and certified by GIA 2557262584. Listed at 3 retailers as of October 30, 2026, with a 25% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
H
Color
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
OriginLab Grown
Grading LabGIA
CertificateGIA 2557262584
Dimensions4.56 × 4.61 × 2.96 mm
L/W Ratio1.01
Culet sizeNone
Top View
4.56 mm4.61 mm0.40 ctH / SI1
OriginLab Grown
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 2557262584
Side View
Table 55.0%CrownGirdlePavilionCulet: NoneDepth 64.4%

Caratlytics Score

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

Price History

Last verified: Nov 1
Current: €1,773 EUR|Low: €557 EUR|High: €1,834 EUR|Avg: €899 EUR|-1.6%
MOH London
Retailer 2
Retailer 3
Retailer 4
November 1, 2026
Retailer 2€569 EUR
Retailer 4€613 EUR
Retailer 3€712 EUR
MOH London€1,773 EUR

32 data points across 4 retailers

3 retailers€569 EUR to €712 EUR

B
Cheapest Retailer
-
€569 EUR
B
Retailer 2
-
€712 EUR
$795 USD
View
Most Expensive
MOH London
2557262584 · Oct 26
€1,773 EUR
£1,560 GBP
View
Price under review
2 more retailers have this diamond
Prices start from €569 EURSave up to €143 EUR

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
€569 EUR