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Round|Lab Grown|IGI

1.40ct J SI1 Round Lab Grown Diamond

EX • J/SI1 • IGI LG451057955

Shape and cutting style on the report: Round brilliant

Certificate IGI LG451057955

Diamond specifications and retailer prices

From $946 AUD
As of November 5, 2026
Save $3,662 AUD (79%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $4,608 AUD at MOH London · As of November 5, 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 LG451057955 or 451057955. Listed at 11 retailers as of November 5, 2026, with prices from $946 to $4,608, a $3,662 spread on the same certified stone. MOH London lists it at $4,608. 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
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.2°
Pavilion angle40.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG451057955
Dimensions7.30 × 7.28 × 4.24 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
7.30 mm7.28 mm1.40 ctJ / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG451057955
Side View
Table 62.0%Crown 32.2°Girdle: MED-STKPavilion 40.1°Culet: NoneDepth 58.1%

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: $4,608 AUD|Low: $909 AUD|High: $4,677 AUD|Avg: $2,014 AUD|-1.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 5, 2026
Retailer 5$946 AUD
Retailer 8$1,059 AUD
Retailer 6$1,097 AUD
Retailer 2$1,143 AUD
Retailer 4$1,350 AUD
Retailer 9$1,777 AUD
Retailer 7$1,790 AUD
Retailer 3$2,803 AUD
Retailer 10$3,140 AUD
MOH London$4,608 AUD

15 data points across 10 retailers

11 retailers$946 AUD to $4,608 AUD

A
Cheapest Retailer
-
$946 AUD
A
Retailer 2
-
$1,029 AUD
View
B+
Retailer 3
-
$1,059 AUD
View
Final sale: no returns
Retailer 4
-
$1,097 AUD
View
Price last confirmed 21 days ago
B+
Retailer 5
-
$1,097 AUD
View
B+
Retailer 6
-
$1,143 AUD
View
B+
Retailer 7
-
$1,350 AUD
View
B
Retailer 8
-
$1,790 AUD
View
B
Retailer 9
-
$2,803 AUD
View
B
Retailer 10
-
$3,084 AUD
View
Most Expensive
B
MOH London
LG451057955 · Nov 5
$4,608 AUD
£2,540 GBP
View
10 more retailers have this diamond
Prices start from $946 AUDSave up to $3,662 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
1.40ct Round
$946 AUD