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Radiant|Lab Grown|IGI

0.51ct D FL Radiant Lab Grown Diamond

ID • D/FL • IGI LG818663118

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

Certificate IGI LG818663118

Diamond specifications and retailer prices

From $375 NZD
$211 USD
As of November 1, 2026
Save $1,688 NZD (82%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $2,063 NZD at Reve Diamonds · As of November 1, 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 FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG818663118 or 818663118. Listed at 18 retailers as of November 1, 2026, with prices from $375 to $2,063, a $1,688 spread on the same certified stone. Reve Diamonds lists it at $2,063. 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
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.6°
Pavilion angle30.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818663118
Dimensions5.72 × 3.89 × 2.59 mm
L/W Ratio1.47
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
5.72 mm3.89 mm0.51 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818663118
Side View
Table 67.0%Crown 40.6°Girdle: MED-STKPavilion 30.1°Culet: NoneDepth 66.6%

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: $760 NZD|Low: $375 NZD|High: $2,194 NZD|Avg: $999 NZD|-9.6%
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
Reve Diamonds
November 2, 2026
Retailer 4$375 NZD
Retailer 5$469 NZD
Retailer 13$590 NZD
Retailer 11$631 NZD
Retailer 10$658 NZD
Retailer 7$713 NZD
Retailer 6$760 NZD
Retailer 1$760 NZD
Retailer 2$882 NZD
Retailer 12$1,031 NZD
Retailer 9$1,349 NZD
Retailer 3$1,440 NZD
Retailer 8$1,966 NZD
Reve Diamonds$2,063 NZD

36 data points across 14 retailers

18 retailers$375 NZD to $2,063 NZD

Retailer 1
-
$338 NZD
$190 USD
Price last confirmed 25 days ago
A
Retailer 2
-
$375 NZD
$211 USD
View
Final sale: no returns
Retailer 3
-
$418 NZD
$235 USD
View
Price last confirmed 21 days ago
Retailer 4
-
$418 NZD
$235 USD
View
Price last confirmed 30 days ago
Retailer 5
-
$462 NZD
$260 USD
View
Price last confirmed 38 days ago
A
Retailer 6
-
$590 NZD
$332 USD
View
A
Retailer 7
-
$631 NZD
$355 USD
View
Retailer 8
-
$658 NZD
$370 USD
View
Price last confirmed 15 days ago
B+
Retailer 9
-
$713 NZD
€382 EUR
View
B+
Retailer 10
-
$760 NZD
ZAR 6,906 ZAR
View
B+
Retailer 11
-
$760 NZD
£337 GBP
View
B+
Retailer 12
-
$882 NZD
$496 USD
View
B+
Retailer 13
-
$1,031 NZD
$580 USD
View
Retailer 14
-
$1,344 NZD
$756 USD
View
Price last confirmed 29 days ago
B
Retailer 15
-
$1,349 NZD
$759 USD
View
B
Retailer 16
-
$1,440 NZD
$810 USD
View
B
Retailer 17
-
$1,966 NZD
£871 GBP
View
Most Expensive
B
Reve Diamonds
72555FB45 · Nov 1
$2,063 NZD
$1,161 USD
View
17 more retailers have this diamond
Prices start from $375 NZDSave up to $1,688 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
$375 NZD