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Radiant|Lab Grown|IGI

0.51ct D IF Radiant Lab Grown Diamond

ID • D/IF • IGI LG818662699

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

Certificate IGI LG818662699

Diamond specifications and retailer prices

From $245 NZD
As of November 4, 2026
Save $1,519 NZD (86%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $1,764 NZD at Reve Diamonds · As of November 4, 2026
View at Reve Diamonds

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 IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG818662699 or 818662699. Listed at 20 retailers as of November 4, 2026, with prices from $245 to $1,764, a $1,519 spread on the same certified stone. Reve Diamonds lists it at $1,764. Flawless clarity in sub-one-carat stones is rarely visible to the naked eye over VS1, so you are paying a meaningful premium for grade rather than appearance.

The 4Cs

0.51
Carat
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38.9°
Pavilion angle35.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818662699
Dimensions5.66 × 3.95 × 2.67 mm
L/W Ratio1.43
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
5.66 mm3.95 mm0.51 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818662699
Side View
Table 63.0%Crown 38.9°Girdle: ThickPavilion 35.1°Culet: NoneDepth 67.6%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: $509 NZD|Low: $234 NZD|High: $1,791 NZD|Avg: $708 NZD|-0.7%
Retailer 1
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
Retailer 16
Retailer 17
Retailer 18
Retailer 19
Reve Diamonds
November 4, 2026
Retailer 16$245 NZD
Retailer 9$273 NZD
Retailer 2$284 NZD
Retailer 17$303 NZD
Retailer 19$303 NZD
Retailer 10$426 NZD
Retailer 1$509 NZD
Retailer 14$539 NZD
Retailer 13$548 NZD
Retailer 11$594 NZD
Retailer 6$598 NZD
Retailer 5$639 NZD
Retailer 12$770 NZD
Retailer 7$836 NZD
Retailer 4$922 NZD
Retailer 18$972 NZD
Retailer 3$1,027 NZD
Retailer 8$1,071 NZD
Retailer 15$1,421 NZD
Reve Diamonds$1,764 NZD

39 data points across 20 retailers

20 retailers$245 NZD to $1,764 NZD

A
Cheapest Retailer
-
$245 NZD
A
Retailer 2
-
$273 NZD
View
Final sale: no returns
A
Retailer 3
-
$284 NZD
View
Retailer 4
-
$303 NZD
View
Price last confirmed 10 days ago
A
Retailer 5
-
$303 NZD
View
A
Retailer 6
-
$426 NZD
View
A
Retailer 7
-
$509 NZD
View
A
Retailer 8
-
$539 NZD
View
A
Retailer 9
-
$548 NZD
View
A
Retailer 10
-
$594 NZD
View
A
Retailer 11
-
$598 NZD
View
Retailer 12
-
$639 NZD
View
Price last confirmed 14 days ago
B+
Retailer 13
-
$770 NZD
View
B+
Retailer 14
-
$836 NZD
View
Retailer 15
-
$922 NZD
View
Price last confirmed 13 days ago
B+
Retailer 16
-
$972 NZD
View
B
Retailer 17
-
$1,027 NZD
View
B
Retailer 18
-
$1,071 NZD
View
B
Retailer 19
-
$1,421 NZD
View
Most Expensive
B
Reve Diamonds
B758134AA · Nov 4
$1,764 NZD
$994 USD
View
19 more retailers have this diamond
Prices start from $245 NZDSave up to $1,519 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
$245 NZD