CaratHunter
Plans
Round|Lab Grown|IGI

1.37ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG681531173

Shape and cutting style on the report: Round brilliant

Certificate IGI LG681531173

Diamond specifications and retailer prices

From £125 GBP
$167 USD
As of October 29, 2026
Save £603 GBP (83%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £728 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 1.37ct lab-grown round diamond

This 1.37ct 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 LG681531173 or 681531173. Listed at 13 retailers as of October 29, 2026, with prices from £125 to £728, a £603 spread on the same certified stone. MOH London lists it at £728. 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

1.37
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.2°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG681531173
Dimensions7.16 × 7.21 × 4.36 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.16 mm7.21 mm1.37 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG681531173
Side View
Table 59.0%Crown 34.2°Girdle: MediumPavilion 40.9°Culet: NoneDepth 60.6%

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 29
Current: £728 GBP|Low: £125 GBP|High: £993 GBP|Avg: £409 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
Retailer 14
Retailer 15
Retailer 16
October 30, 2026
Retailer 12£125 GBP
Retailer 9£145 GBP
Retailer 6£154 GBP
Retailer 16£182 GBP
Retailer 13£266 GBP
Retailer 11£274 GBP
Retailer 3£278 GBP
Retailer 10£302 GBP
Retailer 15£341 GBP
Retailer 14£346 GBP
Retailer 4£381 GBP
Retailer 5£498 GBP
Retailer 2£525 GBP
Retailer 7£703 GBP
MOH London£728 GBP
Retailer 8£993 GBP

4 data points across 16 retailers

13 retailers£125 GBP to £728 GBP

A
Cheapest Retailer
-
£125 GBP
$167 USD
A
Retailer 2
-
£145 GBP
$194 USD
View
A
Retailer 3
-
£154 GBP
$207 USD
View
A
Retailer 4
-
£182 GBP
HK$1,900 HKD
View
A
Retailer 5
-
£266 GBP
€340 EUR
View
A
Retailer 6
-
£274 GBP
View
B+
Retailer 7
-
£278 GBP
$373 USD
View
A
Retailer 8
-
£302 GBP
View
B+
Retailer 9
-
£341 GBP
$457 USD
View
B+
Retailer 10
-
£346 GBP
$463 USD
View
B+
Retailer 11
-
£498 GBP
$667 USD
View
B+
Retailer 12
-
£525 GBP
$704 USD
View
Most Expensive
B
MOH London
LG681531173 · Oct 29
£728 GBP
View
12 more retailers have this diamond
Prices start from £125 GBPSave up to £603 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
1.37ct Round
£125 GBP