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Oval|Lab Grown|IGI

1.18ct E SI1 Oval Lab Grown Diamond

ID • E/SI1 • IGI LG818604621

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG818604621

Diamond specifications and retailer prices

From £116 GBP
$156 USD
As of October 29, 2026
Save £563 GBP (83%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £680 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 1.18ct lab-grown oval diamond

This 1.18ct lab-grown oval sits in the classic one-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG818604621 or 818604621. Listed at 8 retailers as of October 29, 2026, with prices from £116 to £680, a £563 spread on the same certified stone. MOH London lists it at £680. 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
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.4°
Pavilion angle41.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818604621
Dimensions8.81 × 6.04 × 3.65 mm
L/W Ratio1.46
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.81 mm6.04 mm1.18 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818604621
Side View
Table 60.0%Crown 33.4°Girdle: THN-MEDPavilion 41.5°Culet: NoneDepth 60.4%

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: £680 GBP|Low: £116 GBP|High: £680 GBP|Avg: £438 GBP|+3.9%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 29, 2026
Retailer 4£116 GBP
Retailer 2£135 GBP
Retailer 5£252 GBP
Retailer 7£387 GBP
Retailer 6£465 GBP
Retailer 8£485 GBP
Retailer 3£491 GBP
Retailer 9£582 GBP
MOH London£680 GBP

19 data points across 9 retailers

8 retailers£116 GBP to £680 GBP

A
Cheapest Retailer
-
£116 GBP
$156 USD
A
Retailer 2
-
£135 GBP
$181 USD
View
B+
Retailer 3
-
£387 GBP
$518 USD
View
B+
Retailer 4
-
£465 GBP
$623 USD
View
B
Retailer 5
-
£485 GBP
$650 USD
View
B
Retailer 6
-
£491 GBP
$658 USD
View
Retailer 7
-
£582 GBP
SGD 1,053 SGD
View
Price last confirmed 19 days ago
Most Expensive
B
MOH London
LG818604621 · Oct 29
£680 GBP
View
7 more retailers have this diamond
Prices start from £116 GBPSave up to £563 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 Oval
£116 GBP