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Radiant|Lab Grown|IGI

0.51ct D VS2 Radiant Lab Grown Diamond

EX • D/VS2 • IGI LG817666051

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

Certificate IGI LG817666051

Diamond specifications and retailer prices

From £148 GBP
$198 USD
As of November 1, 2026
Save £175 GBP (54%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £913 GBP at MOH London · As of October 29, 2026
View at MOH London

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 VS2 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG817666051 or 817666051. Listed at 10 retailers as of October 30, 2026, with a 119% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

0.51
Carat
D
Colour
VS2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.2°
Pavilion angle38.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG817666051
Dimensions5.54 × 4.02 × 2.74 mm
L/W Ratio1.38
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
5.54 mm4.02 mm0.51 ctD / VS2
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG817666051
Side View
Table 70.0%Crown 40.2°Girdle: Slightly ThickPavilion 38.8°Culet: NoneDepth 68.2%

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: £913 GBP|Low: £116 GBP|High: £918 GBP|Avg: £283 GBP|-0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 1, 2026
Retailer 8£116 GBP
Retailer 9£148 GBP
Retailer 5£187 GBP
Retailer 3£192 GBP
Retailer 2£221 GBP
Retailer 10£224 GBP
Retailer 4£262 GBP
Retailer 6£299 GBP
Retailer 7£323 GBP
MOH London£913 GBP

44 data points across 10 retailers

10 retailers£148 GBP to £323 GBP

Retailer 1
-
£116 GBP
$155 USD
Price last confirmed 16 days ago
A
Retailer 2
-
£148 GBP
$198 USD
View
Retailer 3
-
£187 GBP
$250 USD
View
Price last confirmed 13 days ago
A
Retailer 4
-
£192 GBP
€245 EUR
View
B+
Retailer 5
-
£221 GBP
View
B+
Retailer 6
-
£224 GBP
A$462 AUD
View
B+
Retailer 7
-
£262 GBP
View
B+
Retailer 8
-
£299 GBP
$400 USD
View
B
Retailer 9
-
£323 GBP
$433 USD
View
Most Expensive
MOH London
LG817666051 · Oct 29
£913 GBP
View
Price under review
9 more retailers have this diamond
Prices start from £148 GBPSave up to £175 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
£148 GBP