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Round|Lab Grown|IGI

1.40ct E SI2 Round Lab Grown Diamond

EX • E/SI2 • IGI LG474115433

Shape and cutting style on the report: Round brilliant

Certificate IGI LG474115433

Diamond specifications and retailer prices

From £552 GBP
$740 USD
As of October 30, 2026
Save £748 GBP (58%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £2,282 GBP at NZ Jewellers · As of October 27, 2026
View at NZ Jewellers

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 SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG474115433 or 474115433. Listed at 11 retailers as of October 28, 2026, with a 135% 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
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.9°
Pavilion angle41.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG474115433
Dimensions7.06 × 7.12 × 4.44 mm
L/W Ratio1.01
Girdle conditionFaceted
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
7.06 mm7.12 mm1.40 ctE / SI2
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG474115433
Side View
Table 62.0%Crown 35.9°GirdlePavilion 41.5°Culet: NoneDepth 62.5%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: £552 GBP|Low: £552 GBP|High: £2,789 GBP|Avg: £1,206 GBP|-32.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 30, 2026
Retailer 1£552 GBP
Retailer 5£700 GBP
Retailer 8£784 GBP
Retailer 6£812 GBP
Retailer 2£1,246 GBP
Retailer 7£1,300 GBP
Retailer 4£1,749 GBP
Retailer 3£2,756 GBP

40 data points across 8 retailers

11 retailers£552 GBP to £1,300 GBP

B+
Cheapest Retailer
-
£552 GBP
$740 USD
B
Retailer 2
-
£700 GBP
$938 USD
View
B
Retailer 3
-
£761 GBP
$1,020 USD
View
B
Retailer 4
-
£784 GBP
$1,050 USD
View
Final sale: no returns
Retailer 5
-
£812 GBP
$1,088 USD
View
Price last confirmed 18 days ago
B
Retailer 6
-
£812 GBP
$1,088 USD
View
B
Retailer 7
-
£1,246 GBP
View
B
Retailer 8
-
£1,300 GBP
$1,742 USD
View
Retailer 9
-
£1,749 GBP
$2,344 USD
View
Price under review
Most Expensive
NZ Jewellers
d341522f-ffe8-45d1-9bdd-cefff8ef5e7d · Oct 27
£2,282 GBP
$3,058 USD
View
Price under review
9 more retailers have this diamond
Prices start from £552 GBPSave up to £748 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
£552 GBP