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Heart|Natural|IGI

1.23ct J SI2 Heart Natural Diamond

VG • J/SI2 • IGI 734534502

Shape and cutting style on the report: Heart brilliant

Certificate IGI 734534502

Diamond specifications and retailer prices

From $2,179 NZD
As of November 1, 2026
Save $3,133 NZD (59%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $5,312 NZD at NZ Jewellers · As of November 3, 2026
View at NZ Jewellers

About this 1.23ct natural heart diamond

This 1.23ct natural heart sits in the classic one-carat band, graded J colour (near-colourless) and SI2 clarity (slightly-included), with a very-good cut grade and certified by IGI 734534502. Listed at 5 retailers as of November 1, 2026, with prices from $2,179 to $5,312, a $3,133 spread on the same certified stone. NZ Jewellers lists it at $5,312. 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

1.23
Carat
J
Colour
SI2
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.2°
Pavilion angle42.5°
OriginNatural
Grading LabIGI
CertificateIGI 734534502
Dimensions6.41 × 7.54 × 4.48 mm
L/W Ratio1.18
Girdle conditionFaceted
Culet sizePointed
Top View
6.41 mm7.54 mm1.23 ctJ / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 734534502
Side View
Table 60.0%Crown 32.2°Girdle: MED-THKPavilion 42.5°Culet: NoneDepth 59.4%

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 1
Current: $5,312 NZD|Low: $2,179 NZD|High: $5,518 NZD|Avg: $3,225 NZD|-3.7%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 2, 2026
Retailer 5$2,179 NZD
Retailer 2$2,181 NZD
Retailer 3$2,262 NZD
Retailer 6$2,816 NZD
Retailer 4$4,010 NZD
NZ Jewellers$5,312 NZD

28 data points across 6 retailers

5 retailers$2,179 NZD to $5,312 NZD

A
Cheapest Retailer
-
$2,179 NZD
A
Retailer 2
-
$2,181 NZD
View
A
Retailer 3
-
$2,262 NZD
View
Retailer 4
-
$4,010 NZD
View
Price last confirmed 8 days ago
Most Expensive
B
NZ Jewellers
8e06775a-6f75-4528-b58d-a54a1aa91233 · Nov 3
$5,312 NZD
$2,945 USD
View
4 more retailers have this diamond
Prices start from $2,179 NZDSave up to $3,133 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
1.23ct Heart
$2,179 NZD