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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 $211 USD
As of October 30, 2026
Save $950 USD (82%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $1,161 USD at Reve Diamonds · As of October 30, 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 October 30, 2026, with prices from $211 to $1,161, a $950 spread on the same certified stone. Reve Diamonds lists it at $1,161. 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
Color
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

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: Oct 30
Current: $428 USD|Low: $169 USD|High: $1,234 USD|Avg: $583 USD|-8.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Reve Diamonds
October 30, 2026
Retailer 4$211 USD
Retailer 12$332 USD
Retailer 10$355 USD
Retailer 9$370 USD
Retailer 7$400 USD
Retailer 6$425 USD
Retailer 1$428 USD
Retailer 2$496 USD
Retailer 11$580 USD
Retailer 8$759 USD
Retailer 3$810 USD
Retailer 5$1,106 USD
Reve Diamonds$1,161 USD

37 data points across 13 retailers

18 retailers$211 USD to $1,161 USD

Retailer 1
-
$190 USD
Price last confirmed 22 days ago
A
Retailer 2
-
$211 USD
View
Final sale: no returns
Retailer 3
-
$235 USD
View
Price last confirmed 18 days ago
Retailer 4
-
$235 USD
View
Price last confirmed 27 days ago
Retailer 5
-
$260 USD
View
Price last confirmed 35 days ago
A
Retailer 6
-
$332 USD
View
A
Retailer 7
-
$355 USD
View
Retailer 8
-
$370 USD
View
Price last confirmed 11 days ago
Retailer 9
-
$400 USD
€381 EUR
View
Price last confirmed 7 days ago
B+
Retailer 10
-
$425 USD
ZAR 6,870 ZAR
View
B+
Retailer 11
-
$428 USD
£337 GBP
View
B+
Retailer 12
-
$496 USD
View
B+
Retailer 13
-
$580 USD
View
Retailer 14
-
$756 USD
View
Price last confirmed 25 days ago
B
Retailer 15
-
$759 USD
View
B
Retailer 16
-
$810 USD
View
B
Retailer 17
-
$1,106 USD
£871 GBP
View
Most Expensive
B
Reve Diamonds
72555FB45 · Oct 30
$1,161 USD
View
17 more retailers have this diamond
Prices start from $211 USDSave up to $950 USD

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
$211 USD