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Radiant|Lab Grown|IGI

1.40ct E SI1 Radiant Lab Grown Diamond

VG • E/SI1 • IGI LG691547727

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

Certificate IGI LG691547727

Diamond specifications and retailer prices

From £302 GBP
$404 USD
As of October 29, 2026
Save £528 GBP (64%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £829 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 1.4ct lab-grown radiant diamond

This 1.4ct lab-grown radiant 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 very-good cut grade and certified by IGI LG691547727 or 691547727. Listed at 6 retailers as of October 29, 2026, with prices from £302 to £829, a £528 spread on the same certified stone. MOH London lists it at £829. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.40
Carat
E
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle45.9°
Pavilion angle31.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG691547727
Dimensions7.83 × 5.54 × 3.59 mm
L/W Ratio1.41
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.83 mm5.54 mm1.40 ctE / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG691547727
Side View
Table 64.0%Crown 45.9°Girdle: MED-STKPavilion 31.5°Culet: NoneDepth 64.8%

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 29
Current: £829 GBP|Low: £302 GBP|High: £835 GBP|Avg: £453 GBP|+0.6%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 30, 2026
Retailer 6£302 GBP
Retailer 4£323 GBP
Retailer 5£375 GBP
Retailer 2£383 GBP
Retailer 3£549 GBP
MOH London£829 GBP

40 data points across 6 retailers

6 retailers£302 GBP to £829 GBP

A
Cheapest Retailer
-
£302 GBP
$404 USD
B+
Retailer 2
-
£323 GBP
$433 USD
View
B+
Retailer 3
-
£375 GBP
$502 USD
View
B+
Retailer 4
-
£383 GBP
View
Retailer 5
-
£549 GBP
$735 USD
View
Price last confirmed 9 days ago
Most Expensive
B
MOH London
LG691547727 · Oct 29
£829 GBP
View
5 more retailers have this diamond
Prices start from £302 GBPSave up to £528 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 Radiant
£302 GBP