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Radiant|Lab Grown|IGI

1.51ct D IF Radiant Lab Grown Diamond

ID • D/IF • IGI LG622458506

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

Certificate IGI LG622458506

Diamond specifications and retailer prices

From £208 GBP
$279 USD
As of November 2, 2026
Save £2,088 GBP (91%) vs most expensive(unlock to see where)
29 retailers carry this diamond
Most expensive: £2,296 GBP at Diamond Quarter · As of November 2, 2026
View at Diamond Quarter

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 LG622458506 or 622458506. Listed at 29 retailers as of November 2, 2026, with prices from £208 to £2,296, a £2,088 spread on the same certified stone. Diamond Quarter lists it at £2,296. 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
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle41.8°
Pavilion angle35.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG622458506
Dimensions5.73 × 5.73 × 3.77 mm
L/W Ratio1.00
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
5.73 mm5.73 mm1.51 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG622458506
Side View
Table 63.0%Crown 41.8°Girdle: MediumPavilion 35.2°Culet: NoneDepth 65.8%

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 2
Current: £506 GBP|Low: £208 GBP|High: £2,429 GBP|Avg: £801 GBP|-3.1%
Retailer 1
Retailer 2
Retailer 3
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Retailer 21
November 3, 2026
Retailer 3£208 GBP
Retailer 19£247 GBP
Retailer 21£380 GBP
Retailer 11£382 GBP
Retailer 4£401 GBP
Retailer 9£452 GBP
Retailer 16£462 GBP
Retailer 12£490 GBP
Retailer 1£506 GBP
Retailer 5£585 GBP
Retailer 10£639 GBP
Retailer 18£663 GBP
Retailer 20£791 GBP
Retailer 7£990 GBP
Retailer 13£1,036 GBP
Retailer 6£1,074 GBP
Retailer 14£1,105 GBP
Retailer 15£1,139 GBP
Retailer 2£1,220 GBP
Retailer 8£1,841 GBP
Retailer 17£2,109 GBP

39 data points across 21 retailers

29 retailers£208 GBP to £2,296 GBP

A
Cheapest Retailer
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£208 GBP
$279 USD
Retailer 2
-
£208 GBP
$279 USD
View
Price last confirmed 26 days ago
A
Retailer 3
-
£247 GBP
$331 USD
View
Final sale: no returns
Retailer 4
-
£251 GBP
$337 USD
View
Price last confirmed 36 days ago
Retailer 5
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£258 GBP
$346 USD
View
Price last confirmed 31 days ago
Retailer 6
-
£265 GBP
$355 USD
View
Price last confirmed 35 days ago
A
Retailer 7
-
£380 GBP
$510 USD
View
A
Retailer 8
-
£382 GBP
HK$4,000 HKD
View
A
Retailer 9
-
£401 GBP
$538 USD
View
A
Retailer 10
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£452 GBP
$607 USD
View
A
Retailer 11
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£462 GBP
€591 EUR
View
A
Retailer 12
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£490 GBP
ZAR 10,626 ZAR
View
A
Retailer 13
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£506 GBP
View
A
Retailer 14
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£585 GBP
$785 USD
View
Retailer 15
-
£639 GBP
$857 USD
View
Price last confirmed 7 days ago
A
Retailer 16
-
£663 GBP
A$1,368 AUD
View
B+
Retailer 17
-
£791 GBP
$1,062 USD
View
B+
Retailer 18
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£914 GBP
$1,226 USD
View
Retailer 19
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£914 GBP
$1,226 USD
View
Price last confirmed 23 days ago
Retailer 20
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£952 GBP
$1,277 USD
View
Price last confirmed 33 days ago
B+
Retailer 21
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£990 GBP
$1,328 USD
View
B+
Retailer 22
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£1,036 GBP
$1,390 USD
View
B+
Retailer 23
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£1,074 GBP
$1,441 USD
View
B+
Retailer 24
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£1,105 GBP
SGD 2,004 SGD
View
B+
Retailer 25
-
£1,139 GBP
View
Retailer 26
-
£1,220 GBP
A$2,519 AUD
View
Price last confirmed 25 days ago
B
Retailer 27
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£1,841 GBP
$2,470 USD
View
B
Retailer 28
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£2,109 GBP
$2,830 USD
View
Most Expensive
B
Diamond Quarter
1.51IFDLG0638AEN · Nov 2
£2,296 GBP
View
28 more retailers have this diamond
Prices start from £208 GBPSave up to £2,088 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
£208 GBP