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Round|Lab Grown|IGI

1.40ct J SI1 Round Lab Grown Diamond

ID • J/SI1 • IGI LG451055673

Shape and cutting style on the report: Round brilliant

Certificate IGI LG451055673

Diamond specifications and retailer prices

From €593 EUR
$662 USD
As of October 29, 2026
Save €2,319 EUR (80%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: €2,911 EUR at MOH London · As of October 29, 2026
View at MOH London

About this 1.4ct lab-grown round diamond

This 1.4ct lab-grown round sits in the one-and-a-quarter to one-and-a-half carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG451055673 or 451055673. Listed at 11 retailers as of October 29, 2026, with prices from €593 to €2,911, a €2,319 spread on the same certified stone. MOH London lists it at €2,911. 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

1.40
Carat
J
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.3°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG451055673
Dimensions7.26 × 7.21 × 4.36 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
7.26 mm7.21 mm1.40 ctJ / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG451055673
Side View
Table 58.5%Crown 35.3°Girdle: THN-MEDPavilion 40.3°Culet: NoneDepth 60.2%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 29
Current: €2,911 EUR|Low: €593 EUR|High: €2,931 EUR|Avg: €1,208 EUR|+0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 29, 2026
Retailer 4€593 EUR
Retailer 8€663 EUR
Retailer 6€687 EUR
Retailer 2€846 EUR
Retailer 5€886 EUR
Retailer 9€1,113 EUR
Retailer 7€1,122 EUR
Retailer 3€1,756 EUR
MOH London€2,911 EUR

17 data points across 9 retailers

11 retailers€593 EUR to €2,911 EUR

A
Cheapest Retailer
-
€593 EUR
$662 USD
A
Retailer 2
-
€644 EUR
$720 USD
View
A
Retailer 3
-
€663 EUR
$741 USD
View
Final sale: no returns
Retailer 4
-
€687 EUR
$768 USD
View
Price last confirmed 16 days ago
B+
Retailer 5
-
€687 EUR
$768 USD
View
B+
Retailer 6
-
€846 EUR
$945 USD
View
B+
Retailer 7
-
€886 EUR
$990 USD
View
B
Retailer 8
-
€1,122 EUR
$1,253 USD
View
B
Retailer 9
-
€1,756 EUR
$1,962 USD
View
B
Retailer 10
-
€1,932 EUR
$2,159 USD
View
Most Expensive
B
MOH London
LG451055673 · Oct 29
€2,911 EUR
£2,561 GBP
View
10 more retailers have this diamond
Prices start from €593 EURSave up to €2,319 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.

A
1.40ct Round
€593 EUR