Radiant|Lab Grown|IGI

0.51ct D IF Radiant Lab Grown Diamond

ID • D/IF • IGI LG812644896

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

Certificate IGI LG812644896

Diamond specifications and retailer prices

From £108 GBP
As of November 4, 2026
Save £620 GBP (85%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £728 GBP at Michael Trio · As of November 4, 2026
View at Michael Trio

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 LG812644896 or 812644896. Listed at 20 retailers as of November 4, 2026, with prices from £108 to £728, a £620 spread on the same certified stone. Michael Trio lists it at £728. 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 angle36.6°
Pavilion angle38.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG812644896
Dimensions5.56 × 4.00 × 2.74 mm
L/W Ratio1.39
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
5.56 mm4.00 mm0.51 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG812644896
Side View
Table 66.0%Crown 36.6°Girdle: MediumPavilion 38.7°Culet: NoneDepth 68.5%

Caratlytics Score

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A+
Exceptional
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: £728 GBP|Low: £108 GBP|High: £739 GBP|Avg: £323 GBP|-1.5%
Michael Trio
Retailer 2
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November 4, 2026
Retailer 2£108 GBP
Retailer 15£120 GBP
Retailer 19£125 GBP
Retailer 20£135 GBP
Retailer 11£138 GBP
Retailer 6£184 GBP
Retailer 17£230 GBP
Retailer 5£246 GBP
Retailer 9£252 GBP
Retailer 18£257 GBP
Retailer 4£344 GBP
Retailer 7£357 GBP
Retailer 12£370 GBP
Retailer 8£385 GBP
Retailer 3£430 GBP
Retailer 13£430 GBP
Retailer 16£455 GBP
Retailer 14£471 GBP
Retailer 10£639 GBP
Michael Trio£728 GBP

18 data points across 20 retailers

20 retailers£108 GBP to £728 GBP

A+
Cheapest Retailer
-
£108 GBP
A
Retailer 2
-
£120 GBP
View
Final sale: no returns
A
Retailer 3
-
£125 GBP
View
A
Retailer 4
-
£135 GBP
View
Retailer 5
-
£138 GBP
View
Price last confirmed 10 days ago
A
Retailer 6
-
£184 GBP
View
A
Retailer 7
-
£230 GBP
View
A
Retailer 8
-
£246 GBP
View
A
Retailer 9
-
£252 GBP
View
B+
Retailer 10
-
£257 GBP
View
B+
Retailer 11
-
£344 GBP
View
B+
Retailer 12
-
£357 GBP
View
Retailer 13
-
£370 GBP
View
Price last confirmed 8 days ago
B+
Retailer 14
-
£385 GBP
View
B+
Retailer 15
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£430 GBP
View
B+
Retailer 16
-
£430 GBP
View
B
Retailer 17
-
£455 GBP
View
B+
Retailer 18
-
£471 GBP
View
B
Retailer 19
-
£639 GBP
View
Most Expensive
B
Michael Trio
4020410790 · Nov 4
£728 GBP
SGD 1,329 SGD
View
19 more retailers have this diamond
Prices start from £108 GBPSave up to £620 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
£108 GBP