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Radiant|Lab Grown|IGI

0.51ct D SI1 Radiant Lab Grown Diamond

ID • D/SI1 • IGI LG762555331

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

Certificate IGI LG762555331

Diamond specifications and retailer prices

From £200 GBP
$268 USD
As of November 1, 2026
Save £642 GBP (76%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £842 GBP at MOH London · As of November 1, 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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG762555331 or 762555331. Listed at 8 retailers as of November 1, 2026, with prices from £200 to £842, a £642 spread on the same certified stone. MOH London lists it at £842. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

0.51
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.3°
Pavilion angle34.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG762555331
Dimensions5.71 × 4.02 × 2.59 mm
L/W Ratio1.42
Culet sizePointed
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
5.71 mm4.02 mm0.51 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG762555331
Side View
Table 68.0%Crown 40.3°Girdle: ThickPavilion 34.8°Culet: NoneDepth 64.4%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 1
Current: £842 GBP|Low: £180 GBP|High: £851 GBP|Avg: £301 GBP|+0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 1, 2026
Retailer 6£187 GBP
Retailer 7£200 GBP
Retailer 5£201 GBP
Retailer 2£201 GBP
Retailer 3£239 GBP
Retailer 4£243 GBP
Retailer 8£272 GBP
MOH London£842 GBP

42 data points across 8 retailers

8 retailers£200 GBP to £842 GBP

Retailer 1
-
£187 GBP
$250 USD
Price last confirmed 14 days ago
A
Retailer 2
-
£200 GBP
$268 USD
View
A
Retailer 3
-
£201 GBP
€256 EUR
View
A
Retailer 4
-
£201 GBP
View
B+
Retailer 5
-
£239 GBP
$320 USD
View
B+
Retailer 6
-
£243 GBP
View
B+
Retailer 7
-
£272 GBP
$365 USD
View
Most Expensive
B
MOH London
LG762555331 · Nov 1
£842 GBP
View
7 more retailers have this diamond
Prices start from £200 GBPSave up to £642 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
£200 GBP