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Radiant|Lab Grown|IGI

4.05ct E IF Radiant Lab Grown Diamond

EX • E/IF • IGI LG731593547

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

Certificate IGI LG731593547

Diamond specifications and retailer prices

From £2,311 GBP
€2,931 EUR
As of October 23, 2026
Save £8,292 GBP (78%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: £10,603 GBP at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 4.05ct lab-grown radiant diamond

This 4.05ct lab-grown radiant sits in the three to five carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG731593547 or 731593547. Listed at 22 retailers as of October 23, 2026, with prices from £2,311 to £10,603, a £8,292 spread on the same certified stone. Brilliant Earth lists it at £10,603. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

4.05
Carat
E
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.9°
Pavilion angle34.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG731593547
Dimensions7.89 × 7.89 × 5.24 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
7.89 mm7.89 mm4.05 ctE / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG731593547
Side View
Table 65.0%Crown 43.9°Girdle: Slightly ThickPavilion 34.2°Culet: NoneDepth 66.4%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 23
Current: £10,603 GBP|Low: £1,419 GBP|High: £10,603 GBP|Avg: £3,451 GBP|+70.9%
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
Retailer 14
Retailer 15
Retailer 16
October 30, 2026
Retailer 7£2,311 GBP
Retailer 8£2,534 GBP
Retailer 6£2,557 GBP
Retailer 3£2,594 GBP
Retailer 2£3,342 GBP
Retailer 9£3,401 GBP
Retailer 5£3,719 GBP
Retailer 14£4,269 GBP
Retailer 13£4,272 GBP
Retailer 10£5,265 GBP
Retailer 15£6,214 GBP
Retailer 11£6,304 GBP
Retailer 16£6,479 GBP
Retailer 12£6,886 GBP
Retailer 4£8,619 GBP
Brilliant Earth£10,603 GBP

33 data points across 16 retailers

22 retailers£2,311 GBP to £10,603 GBP

Retailer 1
-
£1,267 GBP
$1,687 USD
Price last confirmed 21 days ago
Retailer 2
-
£1,470 GBP
$1,957 USD
View
Price last confirmed 27 days ago
Retailer 3
-
£1,470 GBP
$1,957 USD
View
Price last confirmed 17 days ago
Retailer 4
-
£1,521 GBP
$2,026 USD
View
Price last confirmed 35 days ago
A
Retailer 5
-
£2,311 GBP
€2,931 EUR
View
A
Retailer 6
-
£2,534 GBP
$3,374 USD
View
A
Retailer 7
-
£2,557 GBP
$3,405 USD
View
A
Retailer 8
-
£2,594 GBP
$3,455 USD
View
Retailer 9
-
£2,754 GBP
$3,668 USD
View
Price last confirmed 25 days ago
A
Retailer 10
-
£3,342 GBP
View
A
Retailer 11
-
£3,401 GBP
$4,529 USD
View
Final sale: no returns
A
Retailer 12
-
£3,719 GBP
$4,952 USD
View
A
Retailer 13
-
£4,269 GBP
View
A
Retailer 14
-
£4,272 GBP
$5,689 USD
View
B+
Retailer 15
-
£5,265 GBP
ZAR 113,279 ZAR
View
B+
Retailer 16
-
£5,919 GBP
$7,882 USD
View
B
Retailer 17
-
£6,214 GBP
$8,275 USD
View
B
Retailer 18
-
£6,304 GBP
View
B+
Retailer 19
-
£6,479 GBP
$8,629 USD
View
B+
Retailer 20
-
£6,886 GBP
$9,170 USD
View
B
Retailer 21
-
£8,619 GBP
$11,478 USD
View
Most Expensive
B
Brilliant Earth
15785857A · Oct 29
£10,603 GBP
$14,120 USD
View
21 more retailers have this diamond
Prices start from £2,311 GBPSave up to £8,292 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
4.05ct Radiant
£2,311 GBP