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Round|Lab Grown|IGI

1.31ct J SI1 Round Lab Grown Diamond

ID • J/SI1 • IGI LG436072947

Shape and cutting style on the report: Round brilliant

Certificate IGI LG436072947

Diamond specifications and retailer prices

From $887 AUD
As of November 5, 2026
Save $3,449 AUD (80%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $4,336 AUD at MOH London · As of November 3, 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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG436072947 or 436072947. Listed at 12 retailers as of November 3, 2026, with prices from $887 to $4,336, a $3,449 spread on the same certified stone. MOH London lists it at $4,336. 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
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.3°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG436072947
Dimensions7.13 × 7.10 × 4.22 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
7.13 mm7.10 mm1.31 ctJ / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG436072947
Side View
Table 59.5%Crown 34.3°GirdlePavilion 40.2°Culet: NoneDepth 59.4%

Caratlytics Score

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

Price History

Last verified: Nov 5
Current: $4,336 AUD|Low: $710 AUD|High: $4,389 AUD|Avg: $1,677 AUD
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 1, 2026
Retailer 6$887 AUD
Retailer 9$994 AUD
Retailer 2$1,071 AUD
Retailer 7$1,100 AUD
Retailer 10$1,100 AUD
Retailer 11$1,113 AUD
Retailer 5$1,286 AUD
Retailer 8$1,684 AUD
Retailer 3$1,736 AUD
Retailer 4$2,731 AUD
MOH London$4,336 AUD

17 data points across 11 retailers

12 retailers$887 AUD to $4,336 AUD

A
Cheapest Retailer
-
$887 AUD
B+
Retailer 2
-
$994 AUD
View
Final sale: no returns
B+
Retailer 3
-
$994 AUD
View
B+
Retailer 4
-
$1,071 AUD
View
B+
Retailer 5
-
$1,100 AUD
View
Retailer 6
-
$1,100 AUD
View
Price last confirmed 21 days ago
B+
Retailer 7
-
$1,113 AUD
View
B+
Retailer 8
-
$1,286 AUD
View
B
Retailer 9
-
$1,684 AUD
View
B
Retailer 10
-
$2,731 AUD
View
B
Retailer 11
-
$2,894 AUD
View
Most Expensive
B
MOH London
LG436072947 · Nov 3
$4,336 AUD
£2,390 GBP
View
11 more retailers have this diamond
Prices start from $887 AUDSave up to $3,449 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
$887 AUD