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Heart|Lab Grown|IGI

1.20ct E SI1 Heart Lab Grown Diamond

EX • E/SI1 • IGI LG833657871

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG833657871

Diamond specifications and retailer prices

From €156 EUR
$174 USD
As of October 30, 2026
Save €569 EUR (79%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: €725 EUR at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 1.2ct lab-grown heart diamond

This 1.2ct 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 LG833657871 or 833657871. Listed at 3 retailers as of October 30, 2026, with prices from €156 to €725, a €569 spread on the same certified stone. Brilliant Earth lists it at €725. 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

1.20
Carat
E
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.6°
Pavilion angle39.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG833657871
Dimensions6.64 × 7.30 × 4.31 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
6.64 mm7.30 mm1.20 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG833657871
Side View
Table 53.0%Crown 34.6°Girdle: MED-STKPavilion 39.4°Culet: NoneDepth 59.0%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 30
Current: €725 EUR|Low: €156 EUR|High: €949 EUR|Avg: €424 EUR|-23.6%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
October 31, 2026
Retailer 3€156 EUR
Retailer 2€311 EUR
Retailer 5€317 EUR
Retailer 4€351 EUR
Brilliant Earth€725 EUR

38 data points across 5 retailers

3 retailers€156 EUR to €725 EUR

A
Cheapest Retailer
-
€156 EUR
$174 USD
Final sale: no returns
A
Retailer 2
-
€311 EUR
£274 GBP
View
Most Expensive
B
Brilliant Earth
21267366A · Oct 30
€725 EUR
$810 USD
View
2 more retailers have this diamond
Prices start from €156 EURSave up to €569 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
1.20ct Heart
€156 EUR