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 $174 USD
As of October 30, 2026
Save $636 USD (79%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: $810 USD 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 $174 to $810, a $636 spread on the same certified stone. Brilliant Earth lists it at $810. 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: $810 USD|Low: $174 USD|High: $1,060 USD|Avg: $472 USD|-23.6%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
October 30, 2026
Retailer 3$174 USD
Retailer 2$351 USD
Retailer 5$354 USD
Retailer 4$392 USD
Brilliant Earth$810 USD

39 data points across 5 retailers

3 retailers$174 USD to $810 USD

A
Cheapest Retailer
-
$174 USD
Final sale: no returns
B+
Retailer 2
-
$351 USD
£276 GBP
View
Most Expensive
B
Brilliant Earth
21267366A · Oct 30
$810 USD
View
2 more retailers have this diamond
Prices start from $174 USDSave up to $636 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
1.20ct Heart
$174 USD