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Radiant|Lab Grown|IGI

2.57ct F IF Radiant Lab Grown Diamond

GD • F/IF • IGI LG731565741

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

Certificate IGI LG731565741

Diamond specifications and retailer prices

From £369 GBP
$494 USD
As of October 30, 2026
Save £3,744 GBP (91%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: £4,112 GBP at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 2.57ct lab-grown radiant diamond

This 2.57ct lab-grown radiant sits in the two to three carat band, graded F colour (colourless) and IF clarity (flawless or internally-flawless), with a standard cut grade and certified by IGI LG731565741 or 731565741. Listed at 25 retailers as of October 30, 2026, with prices from £369 to £4,112, a £3,744 spread on the same certified stone. Brilliant Earth lists it at £4,112. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

2.57
Carat
F
Colour
IF
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle44.1°
Pavilion angle35°
OriginLab Grown
Grading LabIGI
CertificateIGI LG731565741
Dimensions9.86 × 6.78 × 4.54 mm
L/W Ratio1.45
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
9.86 mm6.78 mm2.57 ctF / IF
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG731565741
Side View
Table 65.0%Crown 44.1°Girdle: MediumPavilion 35°Culet: NoneDepth 67.0%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 30
Current: £4,112 GBP|Low: £369 GBP|High: £5,329 GBP|Avg: £1,439 GBP|-22.8%
Brilliant Earth
Retailer 2
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Retailer 22
October 31, 2026
Retailer 9£369 GBP
Retailer 18£413 GBP
Retailer 7£413 GBP
Retailer 20£458 GBP
Retailer 19£485 GBP
Retailer 16£519 GBP
Retailer 4£643 GBP
Retailer 2£697 GBP
Retailer 21£719 GBP
Retailer 13£755 GBP
Retailer 17£1,055 GBP
Retailer 10£1,068 GBP
Retailer 22£1,104 GBP
Retailer 3£1,204 GBP
Retailer 11£1,491 GBP
Retailer 6£1,503 GBP
Retailer 15£1,524 GBP
Retailer 5£1,592 GBP
Retailer 8£1,712 GBP
Retailer 14£2,302 GBP
Retailer 12£3,135 GBP
Brilliant Earth£4,112 GBP

26 data points across 22 retailers

25 retailers£369 GBP to £4,112 GBP

A
Cheapest Retailer
-
£369 GBP
$494 USD
A
Retailer 2
-
£413 GBP
$553 USD
View
Final sale: no returns
A
Retailer 3
-
£413 GBP
$554 USD
View
A
Retailer 4
-
£458 GBP
$613 USD
View
A
Retailer 5
-
£485 GBP
View
A
Retailer 6
-
£519 GBP
$695 USD
View
Retailer 7
-
£524 GBP
$702 USD
View
Price last confirmed 20 days ago
A
Retailer 8
-
£643 GBP
$862 USD
View
A
Retailer 9
-
£697 GBP
€890 EUR
View
A
Retailer 10
-
£719 GBP
$963 USD
View
A
Retailer 11
-
£755 GBP
View
A
Retailer 12
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£1,055 GBP
$1,414 USD
View
A
Retailer 13
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£1,068 GBP
$1,431 USD
View
A
Retailer 14
-
£1,104 GBP
ZAR 23,904 ZAR
View
A
Retailer 15
-
£1,204 GBP
$1,613 USD
View
B+
Retailer 16
-
£1,300 GBP
$1,742 USD
View
A
Retailer 17
-
£1,491 GBP
$1,998 USD
View
B+
Retailer 18
-
£1,503 GBP
$2,014 USD
View
Retailer 19
-
£1,524 GBP
View
Price last confirmed 21 days ago
B+
Retailer 20
-
£1,592 GBP
$2,133 USD
View
B+
Retailer 21
-
£1,596 GBP
$2,139 USD
View
B+
Retailer 22
-
£1,712 GBP
$2,294 USD
View
Retailer 23
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£2,302 GBP
View
Price last confirmed 21 days ago
Retailer 24
-
£3,135 GBP
$4,200 USD
View
Price last confirmed 11 days ago
Most Expensive
B
Brilliant Earth
15784517A · Oct 30
£4,112 GBP
$5,510 USD
View
24 more retailers have this diamond
Prices start from £369 GBPSave up to £3,744 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
2.57ct Radiant
£369 GBP