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Oval|Lab Grown|IGI

0.51ct D SI1 Oval Lab Grown Diamond

EX • D/SI1 • IGI LG837660529

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG837660529

Diamond specifications and retailer prices

From $180 USD
As of October 28, 2026
Save $958 USD (84%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $1,138 USD at MOH London · As of October 25, 2026
View at MOH London

About this 0.51ct lab-grown oval diamond

This 0.51ct lab-grown oval sits in the half to three-quarter carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG837660529 or 837660529. Listed at 7 retailers as of October 25, 2026, with prices from $180 to $1,138, a $958 spread on the same certified stone. MOH London lists it at $1,138. 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

0.51
Carat
D
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.8°
Pavilion angle38.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG837660529
Dimensions6.26 × 4.48 × 2.79 mm
L/W Ratio1.40
Girdle conditionFaceted
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
6.26 mm4.48 mm0.51 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG837660529
Side View
Table 62.0%Crown 35.8°Girdle: STK-THKPavilion 38.1°Culet: NoneDepth 62.3%

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 28
Current: $1,138 USD|Low: $180 USD|High: $1,184 USD|Avg: $413 USD|-3.9%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 30, 2026
Retailer 8$180 USD
Retailer 6$185 USD
Retailer 7$250 USD
Retailer 3$272 USD
Retailer 4$328 USD
Retailer 2$360 USD
Retailer 5$495 USD
MOH London$1,138 USD

13 data points across 8 retailers

7 retailers$180 USD to $1,138 USD

A
Cheapest Retailer
-
$180 USD
A
Retailer 2
-
$185 USD
View
A
Retailer 3
-
$272 USD
£214 GBP
View
B+
Retailer 4
-
$328 USD
£259 GBP
View
B+
Retailer 5
-
$360 USD
View
B
Retailer 6
-
$495 USD
View
Most Expensive
B
MOH London
LG837660529 · Oct 25
$1,138 USD
£896 GBP
View
6 more retailers have this diamond
Prices start from $180 USDSave up to $958 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
0.51ct Oval
$180 USD