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Heart|Lab Grown|IGI

1.00ct E SI2 Heart Lab Grown Diamond

ID • E/SI2 • IGI LG840612266

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG840612266

Diamond specifications and retailer prices

From £116 GBP
$155 USD
As of October 27, 2026
Save £493 GBP (81%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £609 GBP at MOH London · As of October 26, 2026
View at MOH London

About this 1ct lab-grown heart diamond

This 1ct lab-grown heart sits in the classic one-carat band, graded E colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG840612266 or 840612266. Listed at 10 retailers as of October 26, 2026, with prices from £116 to £609, a £493 spread on the same certified stone. MOH London lists it at £609. 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

1.00
Carat
E
Colour
SI2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle37.6°
Pavilion angle44°
OriginLab Grown
Grading LabIGI
CertificateIGI LG840612266
Dimensions6.86 × 6.00 × 4.27 mm
L/W Ratio1.14
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.86 mm6.00 mm1.00 ctE / SI2
OriginLab Grown
CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG840612266
Side View
Table 69.0%Crown 37.6°Girdle: MED-STKPavilion 44°Culet: NoneDepth 62.2%

Caratlytics Score

How it works →
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 27
Current: £609 GBP|Low: £116 GBP|High: £616 GBP|Avg: £279 GBP|-1.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 27, 2026
Retailer 9£116 GBP
Retailer 4£154 GBP
Retailer 5£175 GBP
Retailer 8£199 GBP
Retailer 2£221 GBP
Retailer 7£243 GBP
Retailer 3£280 GBP
Retailer 10£360 GBP
Retailer 6£442 GBP
MOH London£609 GBP

19 data points across 10 retailers

10 retailers£116 GBP to £609 GBP

A
Cheapest Retailer
-
£116 GBP
$155 USD
Final sale: no returns
A
Retailer 2
-
£154 GBP
HK$1,600 HKD
View
Retailer 3
-
£175 GBP
View
Price last confirmed 13 days ago
B+
Retailer 4
-
£199 GBP
$265 USD
View
B+
Retailer 5
-
£221 GBP
View
B+
Retailer 6
-
£243 GBP
$324 USD
View
B+
Retailer 7
-
£280 GBP
View
B
Retailer 8
-
£360 GBP
SGD 648 SGD
View
B
Retailer 9
-
£442 GBP
$588 USD
View
Most Expensive
B
MOH London
LG840612266 · Oct 26
£609 GBP
View
9 more retailers have this diamond
Prices start from £116 GBPSave up to £493 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
1.00ct Heart
£116 GBP