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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 £102 GBP
As of November 4, 2026
Save £634 GBP (86%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £736 GBP 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 £102 to £736, a £634 spread on the same certified stone. Reve Diamonds lists it at £736. 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

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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 4
Current: £213 GBP|Low: £98 GBP|High: £748 GBP|Avg: £296 GBP|-0.7%
Retailer 1
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Retailer 3
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Retailer 19
Reve Diamonds
November 4, 2026
Retailer 16£102 GBP
Retailer 9£114 GBP
Retailer 2£119 GBP
Retailer 17£127 GBP
Retailer 19£127 GBP
Retailer 10£178 GBP
Retailer 1£213 GBP
Retailer 14£225 GBP
Retailer 13£229 GBP
Retailer 11£248 GBP
Retailer 6£250 GBP
Retailer 5£267 GBP
Retailer 12£321 GBP
Retailer 7£349 GBP
Retailer 4£385 GBP
Retailer 18£406 GBP
Retailer 3£429 GBP
Retailer 8£447 GBP
Retailer 15£593 GBP
Reve Diamonds£736 GBP

39 data points across 20 retailers

20 retailers£102 GBP to £736 GBP

A
Cheapest Retailer
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£102 GBP
A
Retailer 2
-
£114 GBP
View
Final sale: no returns
A
Retailer 3
-
£119 GBP
View
Retailer 4
-
£127 GBP
View
Price last confirmed 10 days ago
A
Retailer 5
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£127 GBP
View
A
Retailer 6
-
£178 GBP
View
A
Retailer 7
-
£213 GBP
View
A
Retailer 8
-
£225 GBP
View
A
Retailer 9
-
£229 GBP
View
A
Retailer 10
-
£248 GBP
View
A
Retailer 11
-
£250 GBP
View
Retailer 12
-
£267 GBP
View
Price last confirmed 14 days ago
B+
Retailer 13
-
£321 GBP
View
B+
Retailer 14
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£349 GBP
View
Retailer 15
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£385 GBP
View
Price last confirmed 13 days ago
B+
Retailer 16
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£406 GBP
View
B
Retailer 17
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£429 GBP
View
B
Retailer 18
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£447 GBP
View
B
Retailer 19
-
£593 GBP
View
Most Expensive
B
Reve Diamonds
B758134AA · Nov 4
£736 GBP
$994 USD
View
19 more retailers have this diamond
Prices start from £102 GBPSave up to £634 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
£102 GBP