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Heart|Natural|IGI

1.51ct J SI1 Heart Natural Diamond

VG • J/SI1 • IGI 801638972

Shape and cutting style on the report: Heart brilliant

Certificate IGI 801638972

Diamond specifications and retailer prices

From $3,893 AUD
As of November 5, 2026
Save $5,194 AUD (57%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $9,088 AUD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.51ct natural heart diamond

This 1.51ct 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 801638972. Listed at 14 retailers as of November 5, 2026, with prices from $3,893 to $9,088, a $5,194 spread on the same certified stone. NZ Jewellers lists it at $9,088. 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

1.51
Carat
J
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.8°
Pavilion angle42°
OriginNatural
Grading LabIGI
CertificateIGI 801638972
Dimensions6.37 × 8.03 × 4.75 mm
L/W Ratio1.26
Girdle conditionFaceted
Top View
6.37 mm8.03 mm1.51 ctJ / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 801638972
Side View
Table 61.0%Crown 34.8°Girdle: STK-THKPavilion 42°Culet: NoneDepth 59.2%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: $9,088 AUD|Low: $3,893 AUD|High: $9,088 AUD|Avg: $4,984 AUD|+15.8%
NZ Jewellers
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
November 7, 2026
Retailer 7$3,893 AUD
Retailer 12$3,893 AUD
Retailer 13$4,011 AUD
Retailer 6$4,151 AUD
Retailer 8$4,160 AUD
Retailer 11$4,346 AUD
Retailer 5$4,506 AUD
Retailer 3$4,513 AUD
Retailer 9$4,554 AUD
Retailer 2$4,683 AUD
Retailer 4$5,015 AUD
Retailer 10$5,305 AUD
Retailer 14$7,248 AUD
NZ Jewellers$9,088 AUD

16 data points across 14 retailers

14 retailers$3,893 AUD to $9,088 AUD

A
Cheapest Retailer
-
$3,893 AUD
A
Retailer 2
-
$3,893 AUD
View
A
Retailer 3
-
$4,011 AUD
View
Final sale: no returns
B+
Retailer 4
-
$4,151 AUD
View
A
Retailer 5
-
$4,160 AUD
View
B+
Retailer 6
-
$4,346 AUD
View
Retailer 7
-
$4,506 AUD
View
Price last confirmed 9 days ago
B+
Retailer 8
-
$4,513 AUD
View
B+
Retailer 9
-
$4,554 AUD
View
B+
Retailer 10
-
$4,683 AUD
View
B+
Retailer 11
-
$5,015 AUD
View
B+
Retailer 12
-
$5,305 AUD
View
B
Retailer 13
-
$7,248 AUD
View
Most Expensive
C
NZ Jewellers
dbf0c786-3f3a-41e0-88f3-4c80d0f0fa6c · Nov 5
$9,088 AUD
$6,244 USD
View
13 more retailers have this diamond
Prices start from $3,893 AUDSave up to $5,194 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
1.51ct Heart
$3,893 AUD