CaratHunter
Plans
Round|Lab Grown|IGI

1.18ct G SI2 Round Lab Grown Diamond

ID • G/SI2 • IGI LG371992809

Shape and cutting style on the report: Round brilliant

Certificate IGI LG371992809

Diamond specifications and retailer prices

From £160 GBP
$214 USD
As of October 29, 2026
Save £722 GBP (82%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £881 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 1.18ct lab-grown round diamond

This 1.18ct lab-grown round sits in the classic one-carat band, graded G colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG371992809 or 371992809. Listed at 15 retailers as of October 29, 2026, with prices from £160 to £881, a £722 spread on the same certified stone. MOH London lists it at £881. 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

1.18
Carat
G
Colour
SI2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG371992809
Dimensions6.76 × 6.81 × 4.20 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
This Chemical Vapor Deposition (CVD) laboratory grown diamond is classified as Type IIa
Top View
6.76 mm6.81 mm1.18 ctG / SI2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG371992809
Side View
Table 58.0%Crown 35.5°Girdle: MediumPavilion 41°Culet: NoneDepth 61.9%

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: £881 GBP|Low: £160 GBP|High: £881 GBP|Avg: £427 GBP|+0.4%
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
Retailer 14
October 30, 2026
Retailer 12£160 GBP
Retailer 10£185 GBP
Retailer 9£199 GBP
Retailer 13£199 GBP
Retailer 2£233 GBP
Retailer 7£330 GBP
Retailer 5£391 GBP
Retailer 8£413 GBP
Retailer 11£434 GBP
Retailer 6£509 GBP
Retailer 3£640 GBP
Retailer 4£684 GBP
Retailer 14£703 GBP
MOH London£881 GBP

14 data points across 14 retailers

15 retailers£160 GBP to £881 GBP

A
Cheapest Retailer
-
£160 GBP
$214 USD
A
Retailer 2
-
£185 GBP
$248 USD
View
A
Retailer 3
-
£199 GBP
$266 USD
View
A
Retailer 4
-
£199 GBP
$266 USD
View
B+
Retailer 5
-
£233 GBP
$312 USD
View
B+
Retailer 6
-
£330 GBP
View
B
Retailer 7
-
£391 GBP
$524 USD
View
B
Retailer 8
-
£413 GBP
View
B+
Retailer 9
-
£434 GBP
$582 USD
View
B
Retailer 10
-
£509 GBP
$683 USD
View
B
Retailer 11
-
£619 GBP
$830 USD
View
B
Retailer 12
-
£640 GBP
$857 USD
View
B
Retailer 13
-
£684 GBP
$916 USD
View
B
Retailer 14
-
£703 GBP
$942 USD
View
Most Expensive
B
MOH London
LG371992809 · Oct 29
£881 GBP
View
14 more retailers have this diamond
Prices start from £160 GBPSave up to £722 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
1.18ct Round
£160 GBP