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Heart|Lab Grown|IGI

1.18ct F VVS1 Heart Lab Grown Diamond

EX • F/VVS1 • IGI LG839654363

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG839654363

Diamond specifications and retailer prices

From £171 GBP
As of November 6, 2026
Save £185 GBP (52%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £356 GBP at GemsNY · As of November 3, 2026
View at GemsNY

About this 1.18ct lab-grown heart diamond

This 1.18ct lab-grown heart sits in the classic one-carat band, graded F colour (colourless) and VVS1 clarity (very-very-slightly-included), with a top-tier cut grade and certified by IGI LG839654363 or 839654363. Listed at 3 retailers as of November 3, 2026, with prices from £171 to £356, a £185 spread on the same certified stone. GemsNY lists it at £356. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.18
Carat
F
Colour
VVS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.1°
Pavilion angle40.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG839654363
Dimensions6.18 × 7.31 × 4.46 mm
L/W Ratio1.18
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.18 mm7.31 mm1.18 ctF / VVS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG839654363
Side View
Table 60.0%Crown 36.1°Girdle: MED-STKPavilion 40.1°Culet: NoneDepth 61.0%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 6
Current: £396 GBP|Low: £171 GBP|High: £411 GBP|Avg: £305 GBP
GemsNY
Retailer 2
Retailer 3
Retailer 4
October 29, 2026
Retailer 2£171 GBP
Retailer 3£261 GBP
GemsNY£396 GBP
Retailer 4£411 GBP

6 data points across 4 retailers

3 retailers£171 GBP to £356 GBP

A
Cheapest Retailer
-
£171 GBP
Final sale: no returns
B+
Retailer 2
-
£261 GBP
View
Most Expensive
B+
GemsNY
L898259 · Nov 3
£356 GBP
$477 USD
View
2 more retailers have this diamond
Prices start from £171 GBPSave up to £185 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 Heart
£171 GBP