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Round|Lab Grown|IGI

4.00ct E FL Round Lab Grown Diamond

EX • E/FL

Diamond specifications and retailer prices

From £1,733 GBP
$2,322 USD
As of October 29, 2026
Save £7,995 GBP (82%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £9,728 GBP at Blue Nile · As of October 31, 2026
View at Blue Nile

About this 4ct lab-grown round diamond

This 4ct lab-grown round sits in the three to five carat band, graded E colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI. Listed at 5 retailers as of October 29, 2026, with prices from £1,733 to £9,728, a £7,995 spread on the same certified stone. Blue Nile lists it at £9,728. 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

4.00
Carat
E
Colour
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabIGI
Dimensions10.08 × 10.16 × 6.35 mm
L/W Ratio1.01
Top View
10.08 mm10.16 mm4.00 ctE / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI
Side View
Table 54.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 63.0%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 29
Current: £9,728 GBP|Low: £1,664 GBP|High: £10,473 GBP|Avg: £4,636 GBP|+43.1%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 27, 2026
Retailer 2£1,733 GBP
Retailer 5£1,886 GBP
Retailer 4£2,156 GBP
Retailer 3£3,051 GBP
Blue Nile£9,728 GBP
Retailer 6£10,473 GBP

4 data points across 6 retailers

5 retailers£1,733 GBP to £9,728 GBP

A
Cheapest Retailer
-
£1,733 GBP
$2,322 USD
A
Retailer 2
-
£1,886 GBP
$2,527 USD
View
A
Retailer 3
-
£2,156 GBP
$2,889 USD
View
A
Retailer 4
-
£3,051 GBP
$4,088 USD
View
Most Expensive
B
Blue Nile
30353363 · Oct 31
£9,728 GBP
$13,034 USD
View
4 more retailers have this diamond
Prices start from £1,733 GBPSave up to £7,995 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
4.00ct Round
£1,733 GBP