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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 $4,371 NZD
As of November 6, 2026
Save $5,747 NZD (57%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $10,118 NZD 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 $4,371 to $10,118, a $5,747 spread on the same certified stone. NZ Jewellers lists it at $10,118. 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: $10,118 NZD|Low: $4,371 NZD|High: $10,268 NZD|Avg: $6,569 NZD|-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$4,371 NZD
Retailer 11$5,020 NZD
Retailer 2$5,302 NZD
Retailer 5$5,376 NZD
Retailer 12$5,506 NZD
Retailer 14$5,601 NZD
Retailer 9$5,621 NZD
Retailer 3$5,807 NZD
Retailer 6$5,832 NZD
Retailer 4$6,034 NZD
Retailer 10$7,079 NZD
Retailer 7$8,520 NZD
Retailer 13$9,671 NZD
NZ Jewellers$10,118 NZD

21 data points across 14 retailers

16 retailers$4,371 NZD to $10,118 NZD

A
Cheapest Retailer
-
$4,371 NZD
A
Retailer 2
-
$5,020 NZD
View
B+
Retailer 3
-
$5,302 NZD
View
B+
Retailer 4
-
$5,376 NZD
View
A
Retailer 5
-
$5,506 NZD
View
B+
Retailer 6
-
$5,601 NZD
View
A
Retailer 7
-
$5,621 NZD
View
B+
Retailer 8
-
$5,776 NZD
View
Final sale: no returns
A
Retailer 9
-
$5,807 NZD
View
Retailer 10
-
$5,832 NZD
View
Price last confirmed 9 days ago
B+
Retailer 11
-
$5,919 NZD
View
B+
Retailer 12
-
$6,034 NZD
View
B+
Retailer 13
-
$7,079 NZD
View
B+
Retailer 14
-
$8,520 NZD
View
B
Retailer 15
-
$9,671 NZD
View
Most Expensive
B
NZ Jewellers
bd3e929c-69a8-4605-b02c-91a5173c0542 · Nov 3
$10,118 NZD
$5,609 USD
View
15 more retailers have this diamond
Prices start from $4,371 NZDSave up to $5,747 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
1.51ct Heart
$4,371 NZD