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Round|Lab Grown|IGI

1.51ct J SI2 Round Lab Grown Diamond

ID • J/SI2 • IGI LG440012031

Shape and cutting style on the report: Round brilliant

Certificate IGI LG440012031

Diamond specifications and retailer prices

From $840 USD
As of October 30, 2026
Save $3,332 USD (80%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $4,172 USD at MOH London · As of October 29, 2026
View at MOH London

About this 1.51ct lab-grown round diamond

This 1.51ct lab-grown round sits in the one-and-a-half to two carat band, graded J colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG440012031 or 440012031. Listed at 10 retailers as of October 29, 2026, with prices from $840 to $4,172, a $3,332 spread on the same certified stone. MOH London lists it at $4,172. 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

1.51
Carat
J
Color
SI2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.8°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG440012031
Dimensions7.40 × 7.42 × 4.42 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
7.40 mm7.42 mm1.51 ctJ / SI2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG440012031
Side View
Table 59.0%Crown 32.8°Girdle: MED-STKPavilion 40.2°Culet: NoneDepth 59.6%

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 30
Current: $4,172 USD|Low: $840 USD|High: $4,206 USD|Avg: $1,888 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 2$840 USD
Retailer 4$1,055 USD
Retailer 7$1,148 USD
Retailer 9$1,180 USD
Retailer 5$1,224 USD
Retailer 11$1,766 USD
Retailer 6$1,951 USD
Retailer 8$2,294 USD
Retailer 10$2,557 USD
Retailer 3$2,737 USD
MOH London$4,172 USD

18 data points across 11 retailers

10 retailers$840 USD to $4,172 USD

A
Cheapest Retailer
-
$840 USD
B+
Retailer 2
-
$1,055 USD
View
B+
Retailer 3
-
$1,148 USD
View
B+
Retailer 4
-
$1,180 USD
View
Final sale: no returns
Retailer 5
-
$1,224 USD
View
Price last confirmed 18 days ago
B+
Retailer 6
-
$1,224 USD
View
B
Retailer 7
-
$1,951 USD
View
B
Retailer 8
-
$2,294 USD
View
B
Retailer 9
-
$2,557 USD
View
Most Expensive
B
MOH London
LG440012031 · Oct 29
$4,172 USD
£3,285 GBP
View
9 more retailers have this diamond
Prices start from $840 USDSave up to $3,332 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
1.51ct Round
$840 USD