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Round|Lab Grown|IGI

1.40ct E SI1 Round Lab Grown Diamond

EX • E/SI1 • IGI LG488154404

Shape and cutting style on the report: Round brilliant

Certificate IGI LG488154404

Diamond specifications and retailer prices

From £649 GBP
$870 USD
As of October 29, 2026
Save £931 GBP (59%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £2,076 GBP at Moon Ocean · As of October 30, 2026
View at Moon Ocean

About this 1.4ct lab-grown round diamond

This 1.4ct lab-grown round sits in the one-and-a-quarter to one-and-a-half carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG488154404 or 488154404. Listed at 13 retailers as of October 28, 2026, with a 143% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.40
Carat
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle31.6°
Pavilion angle41.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG488154404
Dimensions7.26 × 7.24 × 4.40 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
7.26 mm7.24 mm1.40 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG488154404
Side View
Table 57.5%Crown 31.6°Girdle: THN-MEDPavilion 41.3°Culet: NoneDepth 60.7%

Caratlytics Score

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B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 29
Current: £2,076 GBP|Low: £649 GBP|High: £3,233 GBP|Avg: £1,440 GBP|+1.1%
Moon Ocean
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 31, 2026
Retailer 5£649 GBP
Retailer 4£857 GBP
Retailer 8£959 GBP
Retailer 6£994 GBP
Retailer 2£1,436 GBP
Retailer 7£1,580 GBP
Moon Ocean£2,076 GBP
Retailer 3£3,211 GBP

46 data points across 8 retailers

13 retailers£649 GBP to £1,580 GBP

B
Cheapest Retailer
-
£649 GBP
$870 USD
B
Retailer 2
-
£857 GBP
$1,148 USD
View
B
Retailer 3
-
£932 GBP
$1,249 USD
View
B
Retailer 4
-
£959 GBP
$1,285 USD
View
Final sale: no returns
B
Retailer 5
-
£994 GBP
$1,332 USD
View
Retailer 6
-
£994 GBP
$1,332 USD
View
Price last confirmed 18 days ago
B
Retailer 7
-
£1,123 GBP
$1,505 USD
View
B
Retailer 8
-
£1,436 GBP
View
B
Retailer 9
-
£1,580 GBP
$2,117 USD
View
Retailer 10
-
£1,864 GBP
$2,497 USD
View
Price under review
Retailer 11
-
£1,959 GBP
$2,625 USD
View
Price under review
Most Expensive
Moon Ocean
NVL-3BE6E83B4-404 · Oct 30
£2,076 GBP
View
Price under review
11 more retailers have this diamond
Prices start from £649 GBPSave up to £931 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.

B
1.40ct Round
£649 GBP