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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 €198 EUR
$221 USD
As of October 30, 2026
Save €805 EUR (80%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: €1,003 EUR 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 29, 2026, with prices from €198 to €1,003, a €805 spread on the same certified stone. Brilliant Earth lists it at €1,003. 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
Colour
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 30
Current: €1,003 EUR|Low: €196 EUR|High: €1,026 EUR|Avg: €461 EUR
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 31, 2026
Retailer 5€198 EUR
Retailer 6€221 EUR
Retailer 3€229 EUR
Retailer 10€245 EUR
Retailer 7€253 EUR
Retailer 8€315 EUR
Retailer 15€329 EUR
Retailer 11€412 EUR
Retailer 4€440 EUR
Retailer 9€455 EUR
Retailer 13€474 EUR
Retailer 2€636 EUR
Retailer 14€788 EUR
Retailer 12€987 EUR
Brilliant Earth€1,003 EUR

40 data points across 15 retailers

15 retailers€198 EUR to €1,003 EUR

A
Cheapest Retailer
-
€198 EUR
$221 USD
A
Retailer 2
-
€221 EUR
$247 USD
View
Final sale: no returns
A
Retailer 3
-
€229 EUR
$256 USD
View
A
Retailer 4
-
€245 EUR
$274 USD
View
A
Retailer 5
-
€253 EUR
$283 USD
View
A
Retailer 6
-
€315 EUR
£277 GBP
View
B+
Retailer 7
-
€329 EUR
$368 USD
View
A
Retailer 8
-
€412 EUR
View
B+
Retailer 9
-
€440 EUR
$492 USD
View
B+
Retailer 10
-
€455 EUR
£400 GBP
View
B+
Retailer 11
-
€474 EUR
$530 USD
View
B
Retailer 12
-
€636 EUR
$711 USD
View
B
Retailer 13
-
€788 EUR
$880 USD
View
B
Retailer 14
-
€987 EUR
£868 GBP
View
Most Expensive
B
Brilliant Earth
13055813A · Oct 29
€1,003 EUR
$1,120 USD
View
14 more retailers have this diamond
Prices start from €198 EURSave up to €805 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
1.57ct Heart
€198 EUR