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Heart|Natural|IGI

1.57ct J SI1 Heart Natural Diamond

VG • J/SI1 • IGI 742527632

Shape and cutting style on the report: Heart brilliant

Certificate IGI 742527632

Diamond specifications and retailer prices

From $3,411 AUD
As of November 6, 2026
Save $3,847 AUD (53%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $9,098 AUD at NZ Jewellers · As of September 30, 2026
View at NZ Jewellers

About this 1.57ct natural heart diamond

This 1.57ct natural heart sits in the one-and-a-half to two carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 742527632. Listed at 14 retailers as of November 4, 2026, with a 113% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.57
Carat
J
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.2°
Pavilion angle41.8°
OriginNatural
Grading LabIGI
CertificateIGI 742527632
Dimensions6.65 × 8.19 × 4.92 mm
L/W Ratio1.23
Girdle conditionFaceted
Culet sizePointed
Top View
6.65 mm8.19 mm1.57 ctJ / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 742527632
Side View
Table 62.0%Crown 35.2°Girdle: STK-THKPavilion 41.8°Culet: NoneDepth 60.1%

Caratlytics Score

How it works →
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: Nov 6
Current: $4,689 AUD|Low: $3,411 AUD|High: $7,364 AUD|Avg: $4,727 AUD|+1.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 7, 2026
Retailer 2$3,411 AUD
Retailer 7$3,900 AUD
Retailer 6$4,026 AUD
Retailer 3$4,164 AUD
Retailer 1$4,689 AUD
Retailer 4$5,311 AUD
Retailer 5$7,258 AUD

30 data points across 7 retailers

14 retailers$3,411 AUD to $7,258 AUD

A
Cheapest Retailer
-
$3,411 AUD
B+
Retailer 2
-
$3,896 AUD
View
B+
Retailer 3
-
$3,900 AUD
View
B+
Retailer 4
-
$4,026 AUD
View
A
Retailer 5
-
$4,164 AUD
View
Retailer 6
-
$4,352 AUD
View
Price last confirmed 30 days ago
Retailer 7
-
$4,352 AUD
View
Price last confirmed 30 days ago
Retailer 8
-
$4,519 AUD
View
Price last confirmed 37 days ago
B+
Retailer 9
-
$4,558 AUD
View
B+
Retailer 10
-
$4,689 AUD
View
Retailer 11
-
$5,021 AUD
View
Price last confirmed 39 days ago
B+
Retailer 12
-
$5,311 AUD
View
B
Retailer 13
-
$7,258 AUD
View
Most Expensive
NZ Jewellers
fc17d06e-797f-4cfc-ba76-2879ecdbce04 · Sep 30
$9,098 AUD
$6,251 USD
View
Price last confirmed 37 days ago
13 more retailers have this diamond
Prices start from $3,411 AUDSave up to $3,847 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
$3,411 AUD