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Round|Lab Grown|IGI

1.38ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG635400214

Shape and cutting style on the report: Round brilliant

Certificate IGI LG635400214

Diamond specifications and retailer prices

From £258 GBP
HK$2,700 HKD
As of October 26, 2026
Save £584 GBP (69%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £860 GBP at MOH London · As of October 21, 2026
View at MOH London

About this 1.38ct lab-grown round diamond

This 1.38ct 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 LG635400214 or 635400214. Listed at 12 retailers as of October 26, 2026, with a 226% 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

1.38
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.9°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG635400214
Dimensions7.23 × 7.27 × 4.36 mm
L/W Ratio1.01
Girdle conditionFaceted
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
7.23 mm7.27 mm1.38 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG635400214
Side View
Table 58.0%Crown 32.9°Girdle: MediumPavilion 41°Culet: NoneDepth 60.2%

Caratlytics Score

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

Price History

Last verified: Oct 26
Current: £860 GBP|Low: £149 GBP|High: £891 GBP|Avg: £497 GBP
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 29, 2026
Retailer 13£149 GBP
Retailer 12£258 GBP
Retailer 9£278 GBP
Retailer 2£300 GBP
Retailer 7£332 GBP
Retailer 5£334 GBP
Retailer 6£358 GBP
Retailer 8£582 GBP
Retailer 10£588 GBP
Retailer 3£717 GBP
Retailer 4£746 GBP
Retailer 11£842 GBP
MOH London£860 GBP

13 data points across 13 retailers

12 retailers£258 GBP to £842 GBP

A
Cheapest Retailer
-
£258 GBP
HK$2,700 HKD
A
Retailer 2
-
£278 GBP
$373 USD
View
A
Retailer 3
-
£300 GBP
€383 EUR
View
A
Retailer 4
-
£332 GBP
View
A
Retailer 5
-
£334 GBP
$447 USD
View
A
Retailer 6
-
£358 GBP
View
B
Retailer 7
-
£582 GBP
$780 USD
View
B
Retailer 8
-
£588 GBP
$788 USD
View
B
Retailer 9
-
£717 GBP
$961 USD
View
B
Retailer 10
-
£746 GBP
SGD 1,351 SGD
View
B
Retailer 11
-
£842 GBP
$1,128 USD
View
Most Expensive
MOH London
LG635400214 · Oct 21
£860 GBP
View
Price last confirmed 9 days ago
11 more retailers have this diamond
Prices start from £258 GBPSave up to £584 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
1.38ct Round
£258 GBP