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Heart|Lab Grown|IGI

0.99ct E SI2 Heart Lab Grown Diamond

ID • E/SI2 • IGI LG840611743

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG840611743

Diamond specifications and retailer prices

From £111 GBP
$148 USD
As of October 23, 2026
Save £533 GBP (83%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £644 GBP at MOH London · As of October 26, 2026
View at MOH London

About this 0.99ct lab-grown heart diamond

This 0.99ct lab-grown heart sits in the just-under-one-carat band, graded E colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG840611743 or 840611743. Listed at 11 retailers as of October 23, 2026, with prices from £111 to £644, a £533 spread on the same certified stone. MOH London lists it at £644. 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

0.99
Carat
E
Colour
SI2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle34.9°
Pavilion angle42.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG840611743
Dimensions6.98 × 6.53 × 3.86 mm
L/W Ratio1.07
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.98 mm6.53 mm0.99 ctE / SI2
OriginLab Grown
CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG840611743
Side View
Table 64.0%Crown 34.9°Girdle: MED-STKPavilion 42.8°Culet: NoneDepth 55.3%

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 23
Current: £644 GBP|Low: £124 GBP|High: £644 GBP|Avg: £231 GBP
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£124 GBP
Retailer 10£137 GBP
Retailer 5£154 GBP
Retailer 2£184 GBP
Retailer 8£221 GBP
Retailer 4£235 GBP
Retailer 7£253 GBP
Retailer 3£295 GBP
Retailer 6£466 GBP
MOH London£644 GBP

20 data points across 10 retailers

11 retailers£111 GBP to £644 GBP

A
Cheapest Retailer
-
£111 GBP
$148 USD
A
Retailer 2
-
£124 GBP
$165 USD
View
Final sale: no returns
A
Retailer 3
-
£137 GBP
$183 USD
View
A
Retailer 4
-
£154 GBP
HK$1,600 HKD
View
A
Retailer 5
-
£184 GBP
View
B+
Retailer 6
-
£221 GBP
$294 USD
View
B+
Retailer 7
-
£235 GBP
€298 EUR
View
B+
Retailer 8
-
£253 GBP
$337 USD
View
B
Retailer 9
-
£295 GBP
View
B
Retailer 10
-
£466 GBP
$621 USD
View
Most Expensive
B
MOH London
LG840611743 · Oct 26
£644 GBP
View
10 more retailers have this diamond
Prices start from £111 GBPSave up to £533 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
0.99ct Heart
£111 GBP