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1.40ct E SI1 Round Lab Grown Diamond

EX • E/SI1 • IGI LG445029020

Shape and cutting style on the report: Round brilliant

Certificate IGI LG445029020

Diamond specifications and retailer prices

From £290 GBP
$388 USD
As of October 30, 2026
Save £472 GBP (62%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £762 GBP at MOH London · As of October 26, 2026
View at MOH London

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 LG445029020 or 445029020. Listed at 4 retailers as of October 26, 2026, with prices from £290 to £762, a £472 spread on the same certified stone. MOH London lists it at £762. 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 angle33.6°
Pavilion angle41.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG445029020
Dimensions7.14 × 7.17 × 4.43 mm
L/W Ratio1.00
Girdle conditionFaceted
Cert comments
This Laboratory grown diamond was created by high pressure high temperature process (HPHT) Type II,No indications of post growth treatment.
Top View
7.14 mm7.17 mm1.40 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG445029020
Side View
Table 59.0%Crown 33.6°Girdle: MED-STKPavilion 41.5°Culet: NoneDepth 62.0%

Caratlytics Score

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

Price History

Last verified: Oct 30
Current: £762 GBP|Low: £220 GBP|High: £1,366 GBP|Avg: £808 GBP|-1.0%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
October 30, 2026
Retailer 3£290 GBP
Retailer 2£291 GBP
Retailer 4£356 GBP
MOH London£762 GBP
Retailer 5£1,172 GBP
Retailer 6£1,366 GBP
Retailer 7£1,366 GBP

33 data points across 7 retailers

4 retailers£290 GBP to £762 GBP

B+
Cheapest Retailer
-
£290 GBP
$388 USD
A
Retailer 2
-
£291 GBP
View
B+
Retailer 3
-
£356 GBP
$477 USD
View
Most Expensive
B
MOH London
LG445029020 · Oct 26
£762 GBP
View
3 more retailers have this diamond
Prices start from £290 GBPSave up to £472 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
1.40ct Round
£290 GBP