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Heart|Lab Grown|IGI

1.57ct E SI1 Heart Lab Grown Diamond

EX • E/SI1 • IGI LG656489091

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG656489091

Diamond specifications and retailer prices

From $221 USD
As of October 27, 2026
Save $899 USD (80%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $1,120 USD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.57ct lab-grown heart diamond

This 1.57ct lab-grown heart sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG656489091 or 656489091. Listed at 15 retailers as of October 27, 2026, with prices from $221 to $1,120, a $899 spread on the same certified stone. Brilliant Earth lists it at $1,120. 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

1.57
Carat
E
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.4°
Pavilion angle39.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG656489091
Dimensions7.30 × 8.05 × 4.56 mm
L/W Ratio1.10
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.30 mm8.05 mm1.57 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG656489091
Side View
Table 62.0%Crown 37.4°Girdle: MED-THKPavilion 39.2°Culet: NoneDepth 56.6%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 27
Current: $1,120 USD|Low: $219 USD|High: $1,147 USD|Avg: $522 USD
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
October 29, 2026
Retailer 4$221 USD
Retailer 5$247 USD
Retailer 15$256 USD
Retailer 8$274 USD
Retailer 7$283 USD
Retailer 11$352 USD
Retailer 14$368 USD
Retailer 9$460 USD
Retailer 3$492 USD
Retailer 2$509 USD
Retailer 12$530 USD
Retailer 6$735 USD
Retailer 13$880 USD
Retailer 10$1,102 USD
Brilliant Earth$1,120 USD

39 data points across 15 retailers

15 retailers$221 USD to $1,120 USD

A
Cheapest Retailer
-
$221 USD
A
Retailer 2
-
$247 USD
View
Final sale: no returns
A
Retailer 3
-
$256 USD
View
A
Retailer 4
-
$274 USD
View
A
Retailer 5
-
$283 USD
View
A
Retailer 6
-
$352 USD
£278 GBP
View
B+
Retailer 7
-
$368 USD
View
A
Retailer 8
-
$460 USD
€438 EUR
View
B+
Retailer 9
-
$492 USD
View
B+
Retailer 10
-
$509 USD
£401 GBP
View
B+
Retailer 11
-
$530 USD
View
B
Retailer 12
-
$735 USD
View
B
Retailer 13
-
$880 USD
View
B
Retailer 14
-
$1,102 USD
£868 GBP
View
Most Expensive
B
Brilliant Earth
13055813A · Oct 29
$1,120 USD
View
14 more retailers have this diamond
Prices start from $221 USDSave up to $899 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
1.57ct Heart
$221 USD