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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 $662 USD
As of November 1, 2026
Save $2,573 USD (80%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $3,235 USD at MOH London · As of November 1, 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 1, 2026, with prices from $662 to $3,235, a $2,573 spread on the same certified stone. MOH London lists it at $3,235. 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
Color
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 1
Current: $3,235 USD|Low: $636 USD|High: $3,274 USD|Avg: $1,397 USD|-1.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 1, 2026
Retailer 5$662 USD
Retailer 8$741 USD
Retailer 6$768 USD
Retailer 2$800 USD
Retailer 4$945 USD
Retailer 9$1,244 USD
Retailer 7$1,253 USD
Retailer 3$1,962 USD
Retailer 10$2,198 USD
MOH London$3,235 USD

16 data points across 10 retailers

11 retailers$662 USD to $3,235 USD

A
Cheapest Retailer
-
$662 USD
A
Retailer 2
-
$720 USD
View
B+
Retailer 3
-
$741 USD
View
Final sale: no returns
Retailer 4
-
$768 USD
View
Price last confirmed 16 days ago
B+
Retailer 5
-
$768 USD
View
B+
Retailer 6
-
$800 USD
View
B+
Retailer 7
-
$945 USD
View
B
Retailer 8
-
$1,253 USD
View
B
Retailer 9
-
$1,962 USD
View
B
Retailer 10
-
$2,159 USD
View
Most Expensive
B
MOH London
LG451057955 · Nov 1
$3,235 USD
£2,547 GBP
View
10 more retailers have this diamond
Prices start from $662 USDSave up to $2,573 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
1.40ct Round
$662 USD