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Heart|Natural|IGI

1.51ct I SI1 Heart Natural Diamond

VG • I/SI1 • IGI 790611321

Shape and cutting style on the report: Heart brilliant

Certificate IGI 790611321

Diamond specifications and retailer prices

From $3,526 AUD
As of November 6, 2026
Save $4,637 AUD (57%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $8,163 AUD at NZ Jewellers · As of November 3, 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 790611321. Listed at 16 retailers as of November 3, 2026, with prices from $3,526 to $8,163, a $4,637 spread on the same certified stone. NZ Jewellers lists it at $8,163. 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
I
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceStrong
Crown angle40.6°
Pavilion angle36.7°
OriginNatural
Grading LabIGI
CertificateIGI 790611321
Dimensions8.01 × 7.17 × 4.45 mm
L/W Ratio1.12
Girdle conditionFaceted
Top View
8.01 mm7.17 mm1.51 ctI / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateIGI 790611321
Side View
Table 60.0%Crown 40.6°Girdle: THN-STKPavilion 36.7°Culet: NoneDepth 55.6%

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 6
Current: $8,163 AUD|Low: $3,526 AUD|High: $8,284 AUD|Avg: $5,300 AUD|-1.5%
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 6, 2026
Retailer 8$3,526 AUD
Retailer 11$4,050 AUD
Retailer 2$4,277 AUD
Retailer 5$4,337 AUD
Retailer 12$4,442 AUD
Retailer 14$4,519 AUD
Retailer 9$4,535 AUD
Retailer 3$4,685 AUD
Retailer 6$4,705 AUD
Retailer 4$4,868 AUD
Retailer 10$5,711 AUD
Retailer 7$6,874 AUD
Retailer 13$7,802 AUD
NZ Jewellers$8,163 AUD

21 data points across 14 retailers

16 retailers$3,526 AUD to $8,163 AUD

A
Cheapest Retailer
-
$3,526 AUD
A
Retailer 2
-
$4,050 AUD
View
B+
Retailer 3
-
$4,277 AUD
View
B+
Retailer 4
-
$4,337 AUD
View
A
Retailer 5
-
$4,442 AUD
View
B+
Retailer 6
-
$4,519 AUD
View
A
Retailer 7
-
$4,535 AUD
View
B+
Retailer 8
-
$4,660 AUD
View
Final sale: no returns
A
Retailer 9
-
$4,685 AUD
View
Retailer 10
-
$4,705 AUD
View
Price last confirmed 9 days ago
B+
Retailer 11
-
$4,775 AUD
View
B+
Retailer 12
-
$4,868 AUD
View
B+
Retailer 13
-
$5,711 AUD
View
B+
Retailer 14
-
$6,874 AUD
View
B
Retailer 15
-
$7,802 AUD
View
Most Expensive
B
NZ Jewellers
bd3e929c-69a8-4605-b02c-91a5173c0542 · Nov 3
$8,163 AUD
$5,609 USD
View
15 more retailers have this diamond
Prices start from $3,526 AUDSave up to $4,637 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
$3,526 AUD