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1.39ct E SI1 Round Lab Grown Diamond

EX • E/SI1 • IGI LG786642414

Shape and cutting style on the report: Round brilliant

Certificate IGI LG786642414

Diamond specifications and retailer prices

From £140 GBP
$188 USD
As of October 29, 2026
Save £680 GBP (83%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £820 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 1.39ct lab-grown round diamond

This 1.39ct 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 LG786642414 or 786642414. Listed at 14 retailers as of October 29, 2026, with prices from £140 to £820, a £680 spread on the same certified stone. MOH London lists it at £820. 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

1.39
Carat
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle31.5°
Pavilion angle41.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG786642414
Dimensions7.21 × 7.17 × 4.40 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
7.21 mm7.17 mm1.39 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG786642414
Side View
Table 58.0%Crown 31.5°Girdle: MED-STKPavilion 41.6°Culet: NoneDepth 61.3%

Caratlytics Score

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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: £820 GBP|Low: £135 GBP|High: £840 GBP|Avg: £357 GBP|-2.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 30, 2026
Retailer 11£140 GBP
Retailer 13£157 GBP
Retailer 5£175 GBP
Retailer 8£295 GBP
Retailer 3£307 GBP
Retailer 7£316 GBP
Retailer 6£341 GBP
Retailer 4£355 GBP
Retailer 12£363 GBP
Retailer 9£381 GBP
Retailer 10£459 GBP
Retailer 2£500 GBP
MOH London£820 GBP

33 data points across 13 retailers

14 retailers£140 GBP to £820 GBP

A
Cheapest Retailer
-
£140 GBP
$188 USD
A
Retailer 2
-
£157 GBP
$211 USD
View
Final sale: no returns
A
Retailer 3
-
£175 GBP
$234 USD
View
A
Retailer 4
-
£295 GBP
€377 EUR
View
B+
Retailer 5
-
£307 GBP
$411 USD
View
A
Retailer 6
-
£316 GBP
View
A
Retailer 7
-
£341 GBP
View
B+
Retailer 8
-
£355 GBP
$476 USD
View
B+
Retailer 9
-
£363 GBP
$487 USD
View
B+
Retailer 10
-
£381 GBP
$510 USD
View
B
Retailer 11
-
£459 GBP
$615 USD
View
B+
Retailer 12
-
£500 GBP
$670 USD
View
Retailer 13
-
£515 GBP
$690 USD
View
Price last confirmed 45 days ago
Most Expensive
B
MOH London
LG786642414 · Oct 29
£820 GBP
View
13 more retailers have this diamond
Prices start from £140 GBPSave up to £680 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
1.39ct Round
£140 GBP