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Heart|Lab Grown|IGI

1.02ct E SI1 Heart Lab Grown Diamond

EX • E/SI1 • IGI LG842655220

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG842655220

Diamond specifications and retailer prices

From £129 GBP
As of November 6, 2026
Save £350 GBP (73%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £478 GBP at Brilliant Earth · As of November 6, 2026
View at Brilliant Earth

About this 1.02ct lab-grown heart diamond

This 1.02ct lab-grown heart 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 LG842655220 or 842655220. Listed at 3 retailers as of November 6, 2026, with prices from £129 to £478, a £350 spread on the same certified stone. Brilliant Earth lists it at £478. 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

1.02
Carat
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle31.4°
Pavilion angle38.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG842655220
Dimensions6.02 × 7.06 × 4.19 mm
L/W Ratio1.17
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.02 mm7.06 mm1.02 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG842655220
Side View
Table 49.0%Crown 31.4°Girdle: MED-STKPavilion 38.3°Culet: NoneDepth 59.3%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 6
Current: £478 GBP|Low: £129 GBP|High: £672 GBP|Avg: £373 GBP|-28.9%
Brilliant Earth
Retailer 2
Retailer 3
November 6, 2026
Retailer 3£129 GBP
Retailer 2£257 GBP
Brilliant Earth£478 GBP

28 data points across 3 retailers

3 retailers£129 GBP to £478 GBP

A
Cheapest Retailer
-
£129 GBP
Final sale: no returns
B+
Retailer 2
-
£257 GBP
View
Most Expensive
B
Brilliant Earth
21744811A · Nov 6
£478 GBP
$640 USD
View
2 more retailers have this diamond
Prices start from £129 GBPSave up to £350 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
1.02ct Heart
£129 GBP