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Radiant|Lab Grown|IGI

0.51ct D VS2 Radiant Lab Grown Diamond

EX • D/VS2 • IGI LG817666139

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG817666139

Diamond specifications and retailer prices

From $351 NZD
$198 USD
As of November 1, 2026
Save $581 NZD (62%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $2,159 NZD at MOH London · As of November 1, 2026
View at MOH London

About this 0.51ct lab-grown radiant diamond

This 0.51ct lab-grown radiant sits in the half to three-quarter carat band, graded D colour (colourless) and VS2 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG817666139 or 817666139. Listed at 10 retailers as of October 31, 2026, with a 165% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

0.51
Carat
D
Colour
VS2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle41°
Pavilion angle38.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG817666139
Dimensions5.59 × 3.97 × 2.67 mm
L/W Ratio1.41
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
5.59 mm3.97 mm0.51 ctD / VS2
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG817666139
Side View
Table 62.0%Crown 41°Girdle: MediumPavilion 38.9°Culet: NoneDepth 67.3%

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: Nov 1
Current: $2,159 NZD|Low: $351 NZD|High: $2,184 NZD|Avg: $734 NZD
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 1, 2026
Retailer 9$351 NZD
Retailer 6$444 NZD
Retailer 4$456 NZD
Retailer 2$524 NZD
Retailer 8$533 NZD
Retailer 5$624 NZD
Retailer 3$639 NZD
Retailer 7$768 NZD
MOH London$2,159 NZD

45 data points across 9 retailers

10 retailers$351 NZD to $932 NZD

A
Cheapest Retailer
-
$351 NZD
$198 USD
Retailer 2
-
$444 NZD
$250 USD
View
Price last confirmed 13 days ago
A
Retailer 3
-
$456 NZD
€245 EUR
View
B+
Retailer 4
-
$524 NZD
£233 GBP
View
B+
Retailer 5
-
$533 NZD
A$462 AUD
View
B+
Retailer 6
-
$624 NZD
£277 GBP
View
B+
Retailer 7
-
$639 NZD
$360 USD
View
B
Retailer 8
-
$768 NZD
$433 USD
View
B
Retailer 9
-
$932 NZD
$526 USD
View
Most Expensive
MOH London
LG817666139 · Nov 1
$2,159 NZD
£958 GBP
View
Price under review
9 more retailers have this diamond
Prices start from $351 NZDSave up to $581 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 Radiant
$351 NZD