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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 £157 GBP
$211 USD
As of October 30, 2026
Save £709 GBP (82%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £866 GBP 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 £157 to £866, a £709 spread on the same certified stone. Reve Diamonds lists it at £866. 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: Oct 30
Current: £319 GBP|Low: £126 GBP|High: £921 GBP|Avg: £420 GBP|-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 1, 2026
Retailer 4£157 GBP
Retailer 5£197 GBP
Retailer 13£248 GBP
Retailer 11£265 GBP
Retailer 10£276 GBP
Retailer 6£299 GBP
Retailer 8£317 GBP
Retailer 1£319 GBP
Retailer 2£370 GBP
Retailer 12£433 GBP
Retailer 9£566 GBP
Retailer 3£605 GBP
Retailer 7£826 GBP
Reve Diamonds£866 GBP

37 data points across 14 retailers

18 retailers£157 GBP to £866 GBP

Retailer 1
-
£142 GBP
$190 USD
Price last confirmed 23 days ago
A
Retailer 2
-
£157 GBP
$211 USD
View
Final sale: no returns
Retailer 3
-
£175 GBP
$235 USD
View
Price last confirmed 19 days ago
Retailer 4
-
£175 GBP
$235 USD
View
Price last confirmed 28 days ago
Retailer 5
-
£194 GBP
$260 USD
View
Price last confirmed 36 days ago
A
Retailer 6
-
£248 GBP
$332 USD
View
A
Retailer 7
-
£265 GBP
$355 USD
View
Retailer 8
-
£276 GBP
$370 USD
View
Price last confirmed 13 days ago
B+
Retailer 9
-
£299 GBP
€382 EUR
View
B+
Retailer 10
-
£317 GBP
ZAR 6,870 ZAR
View
B+
Retailer 11
-
£319 GBP
View
B+
Retailer 12
-
£370 GBP
$496 USD
View
B+
Retailer 13
-
£433 GBP
$580 USD
View
Retailer 14
-
£564 GBP
$756 USD
View
Price last confirmed 27 days ago
B
Retailer 15
-
£566 GBP
$759 USD
View
B
Retailer 16
-
£605 GBP
$810 USD
View
B
Retailer 17
-
£826 GBP
View
Most Expensive
B
Reve Diamonds
72555FB45 · Oct 30
£866 GBP
$1,161 USD
View
17 more retailers have this diamond
Prices start from £157 GBPSave up to £709 GBP

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
£157 GBP