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Round|Lab Grown|IGI

1.51ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG616409331

Shape and cutting style on the report: Round brilliant

Certificate IGI LG616409331

Diamond specifications and retailer prices

From $434 USD
As of November 5, 2026
Save $1,505 USD (78%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $1,979 USD at MOH London · As of October 26, 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 E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG616409331 or 616409331. Listed at 16 retailers as of November 1, 2026, with a 347% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
E
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.4°
Pavilion angle41.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG616409331
Dimensions7.41 × 7.36 × 4.51 mm
L/W Ratio1.01
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
7.41 mm7.36 mm1.51 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG616409331
Side View
Table 60.0%Crown 34.4°GirdlePavilion 41.2°Culet: NoneDepth 61.1%

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: $1,979 USD|Low: $416 USD|High: $1,999 USD|Avg: $974 USD|-1.0%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
November 6, 2026
Retailer 10$434 USD
Retailer 5$484 USD
Retailer 11$486 USD
Retailer 3$505 USD
Retailer 2$538 USD
Retailer 12$538 USD
Retailer 4$846 USD
Retailer 14$870 USD
Retailer 7$876 USD
Retailer 8$922 USD
Retailer 13$1,509 USD
Retailer 9$1,729 USD
Retailer 6$1,939 USD
MOH London$1,979 USD

39 data points across 14 retailers

16 retailers$434 USD to $1,939 USD

A
Cheapest Retailer
-
$434 USD
A
Retailer 2
-
$486 USD
View
A
Retailer 3
-
$505 USD
View
A
Retailer 4
-
$538 USD
View
Retailer 5
-
$538 USD
View
Price last confirmed 12 days ago
B+
Retailer 6
-
$680 USD
View
B+
Retailer 7
-
$777 USD
View
B
Retailer 8
-
$846 USD
View
Retailer 9
-
$870 USD
View
Price last confirmed 16 days ago
B
Retailer 10
-
$876 USD
View
B
Retailer 11
-
$922 USD
View
B
Retailer 12
-
$1,509 USD
View
B
Retailer 13
-
$1,729 USD
View
B
Retailer 14
-
$1,760 USD
View
B
Retailer 15
-
$1,939 USD
View
Most Expensive
MOH London
LG616409331 · Oct 26
$1,979 USD
£1,558 GBP
View
Price last confirmed 10 days ago
15 more retailers have this diamond
Prices start from $434 USDSave up to $1,505 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
$434 USD