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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 $392 NZD
$221 USD
As of October 30, 2026
Save $1,595 NZD (80%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $1,987 NZD 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 $392 to $1,987, a $1,595 spread on the same certified stone. Brilliant Earth lists it at $1,987. 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: $1,987 NZD|Low: $389 NZD|High: $2,035 NZD|Avg: $929 NZD
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 30, 2026
Retailer 4$392 NZD
Retailer 5$438 NZD
Retailer 15$454 NZD
Retailer 9$486 NZD
Retailer 7$502 NZD
Retailer 2$624 NZD
Retailer 14$653 NZD
Retailer 10$816 NZD
Retailer 3$873 NZD
Retailer 8$901 NZD
Retailer 12$940 NZD
Retailer 6$1,304 NZD
Retailer 13$1,561 NZD
Retailer 11$1,956 NZD
Brilliant Earth$1,987 NZD

39 data points across 15 retailers

15 retailers$392 NZD to $1,987 NZD

A
Cheapest Retailer
-
$392 NZD
$221 USD
A
Retailer 2
-
$438 NZD
$247 USD
View
Final sale: no returns
A
Retailer 3
-
$454 NZD
$256 USD
View
A
Retailer 4
-
$486 NZD
$274 USD
View
A
Retailer 5
-
$502 NZD
$283 USD
View
A
Retailer 6
-
$624 NZD
£277 GBP
View
B+
Retailer 7
-
$653 NZD
$368 USD
View
A
Retailer 8
-
$816 NZD
€438 EUR
View
B+
Retailer 9
-
$873 NZD
$492 USD
View
B+
Retailer 10
-
$901 NZD
£400 GBP
View
B+
Retailer 11
-
$940 NZD
$530 USD
View
B
Retailer 12
-
$1,304 NZD
$735 USD
View
B
Retailer 13
-
$1,561 NZD
$880 USD
View
B
Retailer 14
-
$1,956 NZD
£868 GBP
View
Most Expensive
B
Brilliant Earth
13055813A · Oct 29
$1,987 NZD
$1,120 USD
View
14 more retailers have this diamond
Prices start from $392 NZDSave up to $1,595 NZD

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
$392 NZD