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Round|Lab Grown|IGI

1.51ct E SI2 Round Lab Grown Diamond

EX • E/SI2 • IGI LG570362921

Shape and cutting style on the report: Round brilliant

Certificate IGI LG570362921

Diamond specifications and retailer prices

From $455 USD
As of October 28, 2026
Save $64 USD (12%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $1,066 USD at MOH London · As of October 21, 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 SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG570362921 or 570362921. Listed at 5 retailers as of October 28, 2026, with a relatively tight 14% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.3°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG570362921
Dimensions7.33 × 7.28 × 4.57 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
7.33 mm7.28 mm1.51 ctE / SI2
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG570362921
Side View
Table 57.5%Crown 35.3°Girdle: MED-STKPavilion 41°Culet: NoneDepth 62.6%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 28
Current: $1,066 USD|Low: $455 USD|High: $1,443 USD|Avg: $643 USD|-25.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
October 29, 2026
Retailer 3$455 USD
Retailer 2$487 USD
Retailer 5$512 USD
Retailer 4$519 USD
MOH London$1,066 USD

26 data points across 5 retailers

5 retailers$455 USD to $519 USD

A
Cheapest Retailer
-
$455 USD
A
Retailer 2
-
$487 USD
£383 GBP
View
B+
Retailer 3
-
$512 USD
View
B+
Retailer 4
-
$519 USD
View
Most Expensive
B
MOH London
LG570362921 · Oct 21
$1,066 USD
£839 GBP
View
Price last confirmed 8 days ago
4 more retailers have this diamond
Prices start from $455 USDSave up to $64 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
$455 USD