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 $171 USD
As of October 30, 2026
Save $439 USD (72%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: $610 USD at Brilliant Earth · As of October 30, 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 October 30, 2026, with prices from $171 to $610, a $439 spread on the same certified stone. Brilliant Earth lists it at $610. 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
Color
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: Oct 30
Current: $610 USD|Low: $171 USD|High: $990 USD|Avg: $600 USD|-38.4%
Brilliant Earth
Retailer 2
Retailer 3
October 30, 2026
Retailer 3$171 USD
Retailer 2$345 USD
Brilliant Earth$610 USD

31 data points across 3 retailers

3 retailers$171 USD to $610 USD

A
Cheapest Retailer
-
$171 USD
Final sale: no returns
B+
Retailer 2
-
$345 USD
£272 GBP
View
Most Expensive
B
Brilliant Earth
21542387A · Oct 30
$610 USD
View
2 more retailers have this diamond
Prices start from $171 USDSave up to $439 USD

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
$171 USD