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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 $334 NZD
As of November 4, 2026
Save $1,710 NZD (84%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $2,044 NZD at MOH London · As of November 5, 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 8 retailers as of November 4, 2026, with prices from $334 to $2,044, a $1,710 spread on the same certified stone. MOH London lists it at $2,044. 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
Colour
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

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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: Nov 4
Current: $2,044 NZD|Low: $325 NZD|High: $2,135 NZD|Avg: $734 NZD|-4.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 8$325 NZD
Retailer 7$334 NZD
Retailer 3$438 NZD
Retailer 2$485 NZD
Retailer 5$592 NZD
Retailer 4$649 NZD
Retailer 6$893 NZD
MOH London$2,044 NZD

20 data points across 8 retailers

8 retailers$334 NZD to $2,044 NZD

Retailer 1
-
$325 NZD
Price last confirmed 9 days ago
A
Retailer 2
-
$334 NZD
View
A
Retailer 3
-
$438 NZD
View
A
Retailer 4
-
$485 NZD
View
Retailer 5
-
$592 NZD
View
Price last confirmed 9 days ago
B+
Retailer 6
-
$649 NZD
View
B
Retailer 7
-
$893 NZD
View
Most Expensive
B
MOH London
LG837660529 · Nov 5
$2,044 NZD
£892 GBP
View
7 more retailers have this diamond
Prices start from $334 NZDSave up to $1,710 NZD

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
$334 NZD