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Round|Lab Grown|IGI

1.31ct J SI2 Round Lab Grown Diamond

ID • J/SI2 • IGI LG407930537

Shape and cutting style on the report: Round brilliant

Certificate IGI LG407930537

Diamond specifications and retailer prices

From €521 EUR
$582 USD
As of October 29, 2026
Save €2,298 EUR (82%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: €2,819 EUR at MOH London · As of October 29, 2026
View at MOH London

About this 1.31ct lab-grown round diamond

This 1.31ct lab-grown round sits in the one-and-a-quarter to one-and-a-half carat band, graded J colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG407930537 or 407930537. Listed at 10 retailers as of October 29, 2026, with prices from €521 to €2,819, a €2,298 spread on the same certified stone. MOH London lists it at €2,819. 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

1.31
Carat
J
Color
SI2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG407930537
Dimensions7.08 × 7.05 × 4.31 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory grown diamond was created by chemical vapor deposition process (CVD) Type IIa
Top View
7.08 mm7.05 mm1.31 ctJ / SI2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG407930537
Side View
Table 55.5%Crown 36°Girdle: MediumPavilion 40.2°Culet: NoneDepth 61.0%

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: €2,819 EUR|Low: €500 EUR|High: €2,839 EUR|Avg: €1,127 EUR|+0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 30, 2026
Retailer 5€521 EUR
Retailer 10€583 EUR
Retailer 8€584 EUR
Retailer 6€646 EUR
Retailer 2€662 EUR
Retailer 7€994 EUR
Retailer 11€1,035 EUR
Retailer 3€1,352 EUR
Retailer 4€1,603 EUR
Retailer 9€1,699 EUR
MOH London€2,819 EUR

16 data points across 11 retailers

10 retailers€521 EUR to €2,819 EUR

A
Cheapest Retailer
-
€521 EUR
$582 USD
A
Retailer 2
-
€583 EUR
$651 USD
View
Final sale: no returns
A
Retailer 3
-
€584 EUR
$652 USD
View
B+
Retailer 4
-
€646 EUR
$722 USD
View
Retailer 5
-
€646 EUR
$722 USD
View
Price last confirmed 15 days ago
B+
Retailer 6
-
€662 EUR
$740 USD
View
B
Retailer 7
-
€994 EUR
$1,111 USD
View
B
Retailer 8
-
€1,603 EUR
$1,791 USD
View
B
Retailer 9
-
€1,699 EUR
$1,898 USD
View
Most Expensive
B
MOH London
LG407930537 · Oct 29
€2,819 EUR
£2,480 GBP
View
9 more retailers have this diamond
Prices start from €521 EURSave up to €2,298 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
1.31ct Round
€521 EUR