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Heart|Lab Grown|IGI

1.09ct E SI1 Heart Lab Grown Diamond

EX • E/SI1 • IGI LG839643040

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG839643040

Diamond specifications and retailer prices

From €153 EUR
As of November 6, 2026
Save €393 EUR (72%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: €546 EUR at Brilliant Earth · As of November 6, 2026
View at Brilliant Earth

About this 1.09ct lab-grown heart diamond

This 1.09ct 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 LG839643040 or 839643040. Listed at 3 retailers as of November 6, 2026, with prices from €153 to €546, a €393 spread on the same certified stone. Brilliant Earth lists it at €546. 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
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.6°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG839643040
Dimensions6.17 × 7.09 × 4.33 mm
L/W Ratio1.15
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.17 mm7.09 mm1.09 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG839643040
Side View
Table 57.0%Crown 35.6°Girdle: MED-STKPavilion 40.3°Culet: NoneDepth 61.1%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 6
Current: €546 EUR|Low: €153 EUR|High: €887 EUR|Avg: €490 EUR|-38.4%
Brilliant Earth
Retailer 2
Retailer 3
November 6, 2026
Retailer 3€153 EUR
Retailer 2€306 EUR
Brilliant Earth€546 EUR

38 data points across 3 retailers

3 retailers€153 EUR to €546 EUR

A
Cheapest Retailer
-
€153 EUR
Final sale: no returns
B+
Retailer 2
-
€306 EUR
View
Most Expensive
B
Brilliant Earth
21542387A · Nov 6
€546 EUR
$610 USD
View
2 more retailers have this diamond
Prices start from €153 EURSave up to €393 EUR

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
€153 EUR