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Radiant|Lab Grown|IGI

1.51ct D IF Radiant Lab Grown Diamond

EX • D/IF • IGI LG726501737

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

Certificate IGI LG726501737

Diamond specifications and retailer prices

From £230 GBP
$308 USD
As of November 1, 2026
Save £1,890 GBP (89%) vs most expensive(unlock to see where)
29 retailers carry this diamond
Most expensive: £3,256 GBP at Brilliant Earth · As of October 24, 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 IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG726501737 or 726501737. Listed at 29 retailers as of October 27, 2026, with a 824% 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

1.51
Carat
D
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.6°
Pavilion angle34°
OriginLab Grown
Grading LabIGI
CertificateIGI LG726501737
Dimensions8.56 × 5.72 × 3.72 mm
L/W Ratio1.50
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
8.56 mm5.72 mm1.51 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG726501737
Side View
Table 62.0%Crown 39.6°Girdle: MediumPavilion 34°Culet: NoneDepth 65.0%

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: £2,109 GBP|Low: £227 GBP|High: £3,256 GBP|Avg: £786 GBP|-35.2%
Brilliant Earth
Retailer 2
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Retailer 26
November 1, 2026
Retailer 16£227 GBP
Retailer 11£230 GBP
Retailer 8£255 GBP
Retailer 15£263 GBP
Retailer 17£281 GBP
Retailer 13£297 GBP
Retailer 9£362 GBP
Retailer 22£372 GBP
Retailer 26£373 GBP
Retailer 3£449 GBP
Retailer 25£483 GBP
Retailer 20£500 GBP
Retailer 21£543 GBP
Retailer 7£585 GBP
Retailer 24£656 GBP
Retailer 5£783 GBP
Retailer 10£904 GBP
Retailer 19£939 GBP
Retailer 6£980 GBP
Retailer 14£1,053 GBP
Retailer 12£1,067 GBP
Retailer 18£1,090 GBP
Retailer 2£1,127 GBP
Retailer 4£1,826 GBP
Retailer 23£1,829 GBP
Brilliant Earth£2,109 GBP

22 data points across 26 retailers

29 retailers£230 GBP to £2,120 GBP

Retailer 1
-
£227 GBP
$304 USD
Price last confirmed 12 days ago
A
Retailer 2
-
£230 GBP
$308 USD
View
Final sale: no returns
A
Retailer 3
-
£255 GBP
$342 USD
View
Retailer 4
-
£263 GBP
$353 USD
View
Price last confirmed 13 days ago
Retailer 5
-
£281 GBP
$377 USD
View
Price last confirmed 18 days ago
A
Retailer 6
-
£297 GBP
View
A
Retailer 7
-
£362 GBP
HK$3,800 HKD
View
A
Retailer 8
-
£372 GBP
$499 USD
View
A
Retailer 9
-
£373 GBP
$500 USD
View
A
Retailer 10
-
£449 GBP
$603 USD
View
A
Retailer 11
-
£483 GBP
ZAR 10,478 ZAR
View
A
Retailer 12
-
£500 GBP
View
A
Retailer 13
-
£543 GBP
€694 EUR
View
A
Retailer 14
-
£585 GBP
$785 USD
View
A
Retailer 15
-
£656 GBP
A$1,354 AUD
View
A
Retailer 16
-
£783 GBP
$1,051 USD
View
B+
Retailer 17
-
£904 GBP
$1,213 USD
View
B+
Retailer 18
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£939 GBP
$1,261 USD
View
B+
Retailer 19
-
£954 GBP
$1,280 USD
View
B+
Retailer 20
-
£980 GBP
$1,315 USD
View
B+
Retailer 21
-
£1,053 GBP
SGD 1,909 SGD
View
B+
Retailer 22
-
£1,067 GBP
$1,432 USD
View
Retailer 23
-
£1,090 GBP
View
Price last confirmed 12 days ago
B+
Retailer 24
-
£1,127 GBP
View
B
Retailer 25
-
£1,826 GBP
$2,450 USD
View
B+
Retailer 26
-
£1,829 GBP
$2,455 USD
View
B
Retailer 27
-
£2,109 GBP
$2,830 USD
View
B
Retailer 28
-
£2,120 GBP
View
Most Expensive
Brilliant Earth
15368648A · Oct 24
£3,256 GBP
$4,370 USD
View
Price last confirmed 9 days ago
28 more retailers have this diamond
Prices start from £230 GBPSave up to £1,890 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
£230 GBP