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 $267 USD
£211 GBP
As of October 31, 2026
Save $862 USD (76%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $1,129 USD at MOH London · As of October 26, 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 October 26, 2026, with prices from $267 to $1,129, a $862 spread on the same certified stone. MOH London lists it at $1,129. 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
Color
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: Oct 31
Current: $1,129 USD|Low: $241 USD|High: $1,140 USD|Avg: $400 USD|+0.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 31, 2026
Retailer 6$250 USD
Retailer 2$267 USD
Retailer 7$268 USD
Retailer 5$269 USD
Retailer 3$320 USD
Retailer 4$326 USD
Retailer 8$365 USD
MOH London$1,129 USD

42 data points across 8 retailers

8 retailers$267 USD to $1,129 USD

Retailer 1
-
$250 USD
Price last confirmed 13 days ago
A
Retailer 2
-
$267 USD
£211 GBP
View
A
Retailer 3
-
$268 USD
View
A
Retailer 4
-
$269 USD
€256 EUR
View
B+
Retailer 5
-
$320 USD
View
B+
Retailer 6
-
$326 USD
£257 GBP
View
B+
Retailer 7
-
$365 USD
View
Most Expensive
B
MOH London
LG762555331 · Oct 26
$1,129 USD
£889 GBP
View
7 more retailers have this diamond
Prices start from $267 USDSave up to $862 USD

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
$267 USD