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Heart|Natural|IGI

1.00ct J I1 Heart Natural Diamond

GD • J/I1 • IGI 578343737

Shape and cutting style on the report: Heart brilliant

Certificate IGI 578343737

Diamond specifications and retailer prices

From $1,815 NZD
$1,023 USD
As of November 1, 2026
Save $2,810 NZD (61%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $4,626 NZD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1ct natural heart diamond

This 1ct natural heart sits in the classic one-carat band, graded J colour (near-colourless) and I1 clarity (included), with a standard cut grade and certified by IGI 578343737. Listed at 7 retailers as of October 30, 2026, with prices from $1,815 to $4,626, a $2,810 spread on the same certified stone. NZ Jewellers lists it at $4,626. 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

1.00
Carat
J
Colour
I1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryGood
FluorescenceNone
Crown angle43.8°
Pavilion angle33.5°
OriginNatural
Grading LabIGI
CertificateIGI 578343737
Dimensions6.45 × 6.69 × 3.67 mm
L/W Ratio1.04
Girdle conditionFaceted
Top View
6.45 mm6.69 mm1.00 ctJ / I1
OriginNatural
CutGood
PolishExcellent
SymmetryGood
FluorescenceNone
CertificateIGI 578343737
Side View
Table 55.0%Crown 43.8°Girdle: THK-ETKPavilion 33.5°Culet: NoneDepth 56.9%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $4,626 NZD|Low: $1,437 NZD|High: $4,626 NZD|Avg: $2,302 NZD|+1.9%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 31, 2026
Retailer 8$1,437 NZD
Retailer 6$1,815 NZD
Retailer 3$1,897 NZD
Retailer 5$1,897 NZD
Retailer 4$1,969 NZD
Retailer 7$2,188 NZD
Retailer 2$2,660 NZD
NZ Jewellers$4,626 NZD

16 data points across 8 retailers

7 retailers$1,815 NZD to $4,626 NZD

B+
Cheapest Retailer
-
$1,815 NZD
$1,023 USD
B+
Retailer 2
-
$1,897 NZD
$1,069 USD
View
B+
Retailer 3
-
$1,897 NZD
$1,069 USD
View
B+
Retailer 4
-
$1,969 NZD
$1,110 USD
View
B+
Retailer 5
-
$2,188 NZD
$1,233 USD
View
B+
Retailer 6
-
$2,660 NZD
€1,428 EUR
View
Most Expensive
C
NZ Jewellers
166d80e0-3a37-4f16-afa1-cb30f74726d0 · Oct 30
$4,626 NZD
$2,607 USD
View
6 more retailers have this diamond
Prices start from $1,815 NZDSave up to $2,810 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.

B+
1.00ct Heart
$1,815 NZD