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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 $831 AUD
As of November 5, 2026
Save $3,632 AUD (81%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $4,463 AUD at MOH London · As of November 5, 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 November 5, 2026, with prices from $831 to $4,463, a $3,632 spread on the same certified stone. MOH London lists it at $4,463. 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
Colour
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: Nov 5
Current: $4,463 AUD|Low: $799 AUD|High: $4,530 AUD|Avg: $1,826 AUD|-0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 5, 2026
Retailer 5$831 AUD
Retailer 10$930 AUD
Retailer 8$931 AUD
Retailer 6$1,031 AUD
Retailer 2$1,057 AUD
Retailer 7$1,587 AUD
Retailer 11$1,651 AUD
Retailer 3$2,156 AUD
Retailer 4$2,558 AUD
Retailer 9$2,711 AUD
MOH London$4,463 AUD

15 data points across 11 retailers

10 retailers$831 AUD to $4,463 AUD

A
Cheapest Retailer
-
$831 AUD
A
Retailer 2
-
$930 AUD
View
Final sale: no returns
A
Retailer 3
-
$931 AUD
View
B+
Retailer 4
-
$1,031 AUD
View
Retailer 5
-
$1,031 AUD
View
Price last confirmed 21 days ago
B+
Retailer 6
-
$1,057 AUD
View
B
Retailer 7
-
$1,587 AUD
View
B
Retailer 8
-
$2,558 AUD
View
B
Retailer 9
-
$2,711 AUD
View
Most Expensive
B
MOH London
LG407930537 · Nov 5
$4,463 AUD
£2,460 GBP
View
9 more retailers have this diamond
Prices start from $831 AUDSave up to $3,632 AUD

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
$831 AUD