Radiant|Lab Grown|IGI

1.51ct D SI1 Radiant Lab Grown Diamond

ID • D/SI1 • IGI LG732564144

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

Certificate IGI LG732564144

Diamond specifications and retailer prices

From £260 GBP
As of November 6, 2026
Save £659 GBP (72%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £919 GBP at Brilliant Earth · As of November 6, 2026
View at Brilliant Earth

About this 1.51ct lab-grown radiant diamond

This 1.51ct lab-grown radiant sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG732564144 or 732564144. Listed at 16 retailers as of November 6, 2026, with prices from £260 to £919, a £659 spread on the same certified stone. Brilliant Earth lists it at £919. 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

1.51
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.1°
Pavilion angle33.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG732564144
Dimensions8.20 × 5.71 × 3.76 mm
L/W Ratio1.44
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.20 mm5.71 mm1.51 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG732564144
Side View
Table 68.0%Crown 42.1°Girdle: MED-STKPavilion 33.9°Culet: NoneDepth 65.8%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 6
Current: £919 GBP|Low: £137 GBP|High: £1,091 GBP|Avg: £524 GBP|-4.7%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 6, 2026
Retailer 4£137 GBP
Retailer 2£260 GBP
Retailer 9£268 GBP
Retailer 11£275 GBP
Retailer 8£276 GBP
Retailer 6£366 GBP
Retailer 12£394 GBP
Retailer 3£404 GBP
Retailer 13£531 GBP
Retailer 10£714 GBP
Retailer 7£758 GBP
Retailer 5£808 GBP
Brilliant Earth£919 GBP

35 data points across 13 retailers

16 retailers£260 GBP to £919 GBP

Retailer 1
-
£174 GBP
Price last confirmed 30 days ago
Retailer 2
-
£202 GBP
View
Price last confirmed 41 days ago
Retailer 3
-
£216 GBP
View
Price last confirmed 35 days ago
A
Retailer 4
-
£260 GBP
View
Retailer 5
-
£268 GBP
View
Price last confirmed 11 days ago
Retailer 6
-
£275 GBP
View
Price last confirmed 13 days ago
Retailer 7
-
£276 GBP
View
Price last confirmed 10 days ago
A
Retailer 8
-
£366 GBP
View
A
Retailer 9
-
£394 GBP
View
Retailer 10
-
£404 GBP
View
Price last confirmed 12 days ago
Retailer 11
-
£531 GBP
View
Price last confirmed 11 days ago
Retailer 12
-
£695 GBP
View
Price last confirmed 38 days ago
Retailer 13
-
£714 GBP
View
Price last confirmed 13 days ago
Retailer 14
-
£758 GBP
View
Price last confirmed 10 days ago
Retailer 15
-
£808 GBP
View
Price last confirmed 13 days ago
Most Expensive
B
Brilliant Earth
15840212A · Nov 6
£919 GBP
$1,230 USD
View
15 more retailers have this diamond
Prices start from £260 GBPSave up to £659 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
1.51ct Radiant
£260 GBP