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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 $582 USD
As of October 29, 2026
Save $2,568 USD (82%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $3,150 USD 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 $582 to $3,150, a $2,568 spread on the same certified stone. MOH London lists it at $3,150. 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: $3,150 USD|Low: $559 USD|High: $3,171 USD|Avg: $1,259 USD|+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$582 USD
Retailer 10$651 USD
Retailer 8$652 USD
Retailer 6$722 USD
Retailer 2$740 USD
Retailer 7$1,111 USD
Retailer 11$1,156 USD
Retailer 3$1,510 USD
Retailer 4$1,791 USD
Retailer 9$1,898 USD
MOH London$3,150 USD

16 data points across 11 retailers

10 retailers$582 USD to $3,150 USD

A
Cheapest Retailer
-
$582 USD
A
Retailer 2
-
$651 USD
View
Final sale: no returns
A
Retailer 3
-
$652 USD
View
B+
Retailer 4
-
$722 USD
View
Retailer 5
-
$722 USD
View
Price last confirmed 15 days ago
B+
Retailer 6
-
$740 USD
View
B
Retailer 7
-
$1,111 USD
View
B
Retailer 8
-
$1,791 USD
View
B
Retailer 9
-
$1,898 USD
View
Most Expensive
B
MOH London
LG407930537 · Oct 29
$3,150 USD
£2,480 GBP
View
9 more retailers have this diamond
Prices start from $582 USDSave up to $2,568 USD

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
$582 USD