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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 $300 AUD
$211 USD
As of November 1, 2026
Save $1,352 AUD (82%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $1,653 AUD 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 $300 to $1,653, a $1,352 spread on the same certified stone. Reve Diamonds lists it at $1,653. 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: $609 AUD|Low: $300 AUD|High: $1,757 AUD|Avg: $801 AUD|-8.4%
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$300 AUD
Retailer 5$376 AUD
Retailer 13$473 AUD
Retailer 11$505 AUD
Retailer 10$527 AUD
Retailer 7$571 AUD
Retailer 6$609 AUD
Retailer 1$609 AUD
Retailer 2$706 AUD
Retailer 12$826 AUD
Retailer 9$1,081 AUD
Retailer 3$1,153 AUD
Retailer 8$1,575 AUD
Reve Diamonds$1,653 AUD

37 data points across 14 retailers

18 retailers$300 AUD to $1,653 AUD

Retailer 1
-
$270 AUD
$190 USD
Price last confirmed 25 days ago
A
Retailer 2
-
$300 AUD
$211 USD
View
Final sale: no returns
Retailer 3
-
$335 AUD
$235 USD
View
Price last confirmed 21 days ago
Retailer 4
-
$335 AUD
$235 USD
View
Price last confirmed 30 days ago
Retailer 5
-
$370 AUD
$260 USD
View
Price last confirmed 38 days ago
A
Retailer 6
-
$473 AUD
$332 USD
View
A
Retailer 7
-
$505 AUD
$355 USD
View
Retailer 8
-
$527 AUD
$370 USD
View
Price last confirmed 14 days ago
B+
Retailer 9
-
$571 AUD
€382 EUR
View
B+
Retailer 10
-
$609 AUD
ZAR 6,906 ZAR
View
B+
Retailer 11
-
$609 AUD
£337 GBP
View
B+
Retailer 12
-
$706 AUD
$496 USD
View
B+
Retailer 13
-
$826 AUD
$580 USD
View
Retailer 14
-
$1,076 AUD
$756 USD
View
Price last confirmed 28 days ago
B
Retailer 15
-
$1,081 AUD
$759 USD
View
B
Retailer 16
-
$1,153 AUD
$810 USD
View
B
Retailer 17
-
$1,575 AUD
£871 GBP
View
Most Expensive
B
Reve Diamonds
72555FB45 · Nov 1
$1,653 AUD
$1,161 USD
View
17 more retailers have this diamond
Prices start from $300 AUDSave up to $1,352 AUD

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
$300 AUD