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Oval|Lab Grown|IGI

1.51ct D SI1 Oval Lab Grown Diamond

ID • D/SI1 • IGI LG550255096

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG550255096

Diamond specifications and retailer prices

From $233 USD
As of October 29, 2026
Save $932 USD (80%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $1,165 USD at MOH London · As of October 29, 2026
View at MOH London

About this 1.51ct lab-grown oval diamond

This 1.51ct lab-grown oval sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG550255096 or 550255096. Listed at 18 retailers as of October 29, 2026, with prices from $233 to $1,165, a $932 spread on the same certified stone. MOH London lists it at $1,165. 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
D
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.7°
Pavilion angle40.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG550255096
Dimensions9.48 × 6.50 × 3.94 mm
L/W Ratio1.46
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
9.48 mm6.50 mm1.51 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG550255096
Side View
Table 59.0%Crown 34.7°Girdle: MediumPavilion 40.1°Culet: NoneDepth 60.6%

Caratlytics Score

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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 29
Current: $1,165 USD|Low: $185 USD|High: $1,180 USD|Avg: $610 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
Retailer 12
Retailer 13
Retailer 14
Retailer 15
October 30, 2026
Retailer 11$233 USD
Retailer 5$268 USD
Retailer 9$270 USD
Retailer 13$289 USD
Retailer 15$408 USD
Retailer 8$484 USD
Retailer 6$541 USD
Retailer 2$545 USD
Retailer 10$603 USD
Retailer 7$631 USD
Retailer 12$929 USD
Retailer 14$932 USD
Retailer 3$935 USD
Retailer 4$1,150 USD
MOH London$1,165 USD

42 data points across 15 retailers

18 retailers$233 USD to $1,165 USD

A
Cheapest Retailer
-
$233 USD
A
Retailer 2
-
$268 USD
View
Final sale: no returns
A
Retailer 3
-
$270 USD
View
A
Retailer 4
-
$289 USD
View
A
Retailer 5
-
$333 USD
HK$2,600 HKD
View
B+
Retailer 6
-
$408 USD
View
A
Retailer 7
-
$484 USD
€461 EUR
View
A
Retailer 8
-
$504 USD
View
B+
Retailer 9
-
$541 USD
View
B+
Retailer 10
-
$545 USD
£429 GBP
View
B+
Retailer 11
-
$603 USD
A$928 AUD
View
B+
Retailer 12
-
$631 USD
View
B
Retailer 13
-
$929 USD
View
B
Retailer 14
-
$932 USD
View
Retailer 15
-
$935 USD
View
Price last confirmed 11 days ago
B
Retailer 16
-
$977 USD
SGD 1,320 SGD
View
B
Retailer 17
-
$1,150 USD
View
Most Expensive
B
MOH London
LG550255096 · Oct 29
$1,165 USD
£917 GBP
View
17 more retailers have this diamond
Prices start from $233 USDSave up to $932 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 Oval
$233 USD