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Round|Lab Grown|IGI

1.51ct I SI2 Round Lab Grown Diamond

ID • I/SI2 • IGI LG492122445

Shape and cutting style on the report: Round brilliant

Certificate IGI LG492122445

Diamond specifications and retailer prices

From $840 USD
As of November 5, 2026
Save $3,765 USD (82%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $4,605 USD at MOH London · As of November 3, 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 I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG492122445 or 492122445. Listed at 10 retailers as of November 3, 2026, with prices from $840 to $4,605, a $3,765 spread on the same certified stone. MOH London lists it at $4,605. 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
I
Color
SI2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG492122445
Dimensions7.39 × 7.44 × 4.49 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
7.39 mm7.44 mm1.51 ctI / SI2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG492122445
Side View
Table 57.0%Crown 34.5°Girdle: MediumPavilion 40.2°Culet: NoneDepth 60.5%

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: $4,605 USD|Low: $840 USD|High: $4,667 USD|Avg: $2,180 USD
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 3, 2026
Retailer 2$840 USD
Retailer 4$1,236 USD
Retailer 8$1,344 USD
Retailer 7$1,384 USD
Retailer 5$1,433 USD
Retailer 11$2,020 USD
Retailer 6$2,273 USD
Retailer 9$2,687 USD
Retailer 10$2,746 USD
Retailer 3$3,209 USD
MOH London$4,605 USD

16 data points across 11 retailers

10 retailers$840 USD to $4,605 USD

A
Cheapest Retailer
-
$840 USD
A
Retailer 2
-
$1,236 USD
View
B+
Retailer 3
-
$1,344 USD
View
B+
Retailer 4
-
$1,384 USD
View
Final sale: no returns
Retailer 5
-
$1,433 USD
View
Price last confirmed 25 days ago
B+
Retailer 6
-
$1,433 USD
View
B
Retailer 7
-
$2,273 USD
View
B
Retailer 8
-
$2,687 USD
View
B
Retailer 9
-
$2,746 USD
View
Most Expensive
B
MOH London
LG492122445 · Nov 3
$4,605 USD
£3,626 GBP
View
9 more retailers have this diamond
Prices start from $840 USDSave up to $3,765 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