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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 $315 AUD
$221 USD
As of October 30, 2026
Save $1,280 AUD (80%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $1,594 AUD 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 $315 to $1,594, a $1,280 spread on the same certified stone. Brilliant Earth lists it at $1,594. 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: $1,594 AUD|Low: $312 AUD|High: $1,633 AUD|Avg: $733 AUD
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$315 AUD
Retailer 6$352 AUD
Retailer 3$364 AUD
Retailer 10$390 AUD
Retailer 7$403 AUD
Retailer 8$500 AUD
Retailer 15$524 AUD
Retailer 11$655 AUD
Retailer 4$700 AUD
Retailer 9$723 AUD
Retailer 13$755 AUD
Retailer 2$1,012 AUD
Retailer 14$1,253 AUD
Retailer 12$1,569 AUD
Brilliant Earth$1,594 AUD

40 data points across 15 retailers

15 retailers$315 AUD to $1,594 AUD

A
Cheapest Retailer
-
$315 AUD
$221 USD
A
Retailer 2
-
$352 AUD
$247 USD
View
Final sale: no returns
A
Retailer 3
-
$364 AUD
$256 USD
View
A
Retailer 4
-
$390 AUD
$274 USD
View
A
Retailer 5
-
$403 AUD
$283 USD
View
A
Retailer 6
-
$500 AUD
£277 GBP
View
B+
Retailer 7
-
$524 AUD
$368 USD
View
A
Retailer 8
-
$655 AUD
€438 EUR
View
B+
Retailer 9
-
$700 AUD
$492 USD
View
B+
Retailer 10
-
$723 AUD
£400 GBP
View
B+
Retailer 11
-
$755 AUD
$530 USD
View
B
Retailer 12
-
$1,012 AUD
$711 USD
View
B
Retailer 13
-
$1,253 AUD
$880 USD
View
B
Retailer 14
-
$1,569 AUD
£868 GBP
View
Most Expensive
B
Brilliant Earth
13055813A · Oct 29
$1,594 AUD
$1,120 USD
View
14 more retailers have this diamond
Prices start from $315 AUDSave up to $1,280 AUD

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
$315 AUD