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Oval|Lab Grown|IGI

0.51ct D SI1 Oval Lab Grown Diamond

EX • D/SI1 • IGI LG764605608

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG764605608

Diamond specifications and retailer prices

From $155 NZD
As of November 1, 2026
Save $593 NZD (79%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $1,425 NZD at MOH London · As of October 29, 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 LG764605608 or 764605608. Listed at 15 retailers as of November 1, 2026, with a 383% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle32.5°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG764605608
Dimensions6.19 × 4.56 × 2.85 mm
L/W Ratio1.36
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
6.19 mm4.56 mm0.51 ctD / SI1
OriginLab Grown
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG764605608
Side View
Table 58.0%Crown 32.5°Girdle: STK-THKPavilion 40.8°Culet: NoneDepth 62.5%

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 1
Current: $1,425 NZD|Low: $150 NZD|High: $1,434 NZD|Avg: $451 NZD|-0.6%
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
November 2, 2026
Retailer 9$155 NZD
Retailer 13$175 NZD
Retailer 5$206 NZD
Retailer 12$206 NZD
Retailer 7$307 NZD
Retailer 6$348 NZD
Retailer 10$370 NZD
Retailer 3$411 NZD
Retailer 2$413 NZD
Retailer 8$465 NZD
Retailer 11$505 NZD
Retailer 4$749 NZD
MOH London$1,425 NZD

41 data points across 13 retailers

15 retailers$155 NZD to $749 NZD

A
Cheapest Retailer
-
$155 NZD
A
Retailer 2
-
$180 NZD
View
A
Retailer 3
-
$206 NZD
View
Retailer 4
-
$206 NZD
View
Price last confirmed 12 days ago
A
Retailer 5
-
$307 NZD
View
A
Retailer 6
-
$348 NZD
View
A
Retailer 7
-
$370 NZD
View
A
Retailer 8
-
$411 NZD
View
B+
Retailer 9
-
$413 NZD
View
A
Retailer 10
-
$465 NZD
View
B+
Retailer 11
-
$505 NZD
View
B+
Retailer 12
-
$621 NZD
View
B
Retailer 13
-
$727 NZD
View
B
Retailer 14
-
$749 NZD
View
Most Expensive
MOH London
LG764605608 · Oct 29
$1,425 NZD
£622 GBP
View
Price last confirmed 8 days ago
14 more retailers have this diamond
Prices start from $155 NZDSave up to $593 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
$155 NZD