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Heart|Lab Grown|IGI

1.09ct F SI1 Heart Lab Grown Diamond

ID • F/SI1 • IGI LG849651126

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG849651126

Diamond specifications and retailer prices

From £116 GBP
$156 USD
As of November 2, 2026
Save £559 GBP (83%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £676 GBP at MOH London · As of November 2, 2026
View at MOH London

About this 1.09ct lab-grown heart diamond

This 1.09ct lab-grown heart sits in the classic one-carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG849651126 or 849651126. Listed at 10 retailers as of November 2, 2026, with prices from £116 to £676, a £559 spread on the same certified stone. MOH London lists it at £676. 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

1.09
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.2°
Pavilion angle38.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG849651126
Dimensions7.15 × 6.49 × 3.97 mm
L/W Ratio1.10
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.15 mm6.49 mm1.09 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG849651126
Side View
Table 60.0%Crown 32.2°Girdle: STK-THKPavilion 38.1°Culet: NoneDepth 55.5%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 2
Current: £676 GBP|Low: £116 GBP|High: £676 GBP|Avg: £325 GBP
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 3, 2026
Retailer 5£116 GBP
Retailer 6£187 GBP
Retailer 8£195 GBP
Retailer 4£249 GBP
Retailer 2£251 GBP
Retailer 9£255 GBP
Retailer 7£274 GBP
Retailer 3£491 GBP
Retailer 10£506 GBP
MOH London£676 GBP

4 data points across 10 retailers

10 retailers£116 GBP to £676 GBP

A
Cheapest Retailer
-
£116 GBP
$156 USD
A
Retailer 2
-
£187 GBP
View
B+
Retailer 3
-
£195 GBP
$262 USD
View
A
Retailer 4
-
£249 GBP
€318 EUR
View
A
Retailer 5
-
£251 GBP
View
A
Retailer 6
-
£255 GBP
$342 USD
View
A
Retailer 7
-
£274 GBP
View
B
Retailer 8
-
£491 GBP
$659 USD
View
B+
Retailer 9
-
£506 GBP
$679 USD
View
Most Expensive
B
MOH London
LG849651126 · Nov 2
£676 GBP
View
9 more retailers have this diamond
Prices start from £116 GBPSave up to £559 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
1.09ct Heart
£116 GBP