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Heart|Natural|IGI

1.23ct J SI1 Heart Natural Diamond

VG • J/SI1 • IGI 704515160

Shape and cutting style on the report: Heart brilliant

Certificate IGI 704515160

Diamond specifications and retailer prices

From $2,003 AUD
As of November 6, 2026
Save $3,375 AUD (63%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $5,378 AUD at NZ Jewellers · As of November 5, 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 SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 704515160. Listed at 15 retailers as of November 5, 2026, with prices from $2,003 to $5,378, a $3,375 spread on the same certified stone. NZ Jewellers lists it at $5,378. 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
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.2°
Pavilion angle41.1°
OriginNatural
Grading LabIGI
CertificateIGI 704515160
Dimensions6.52 × 7.39 × 4.43 mm
L/W Ratio1.13
Girdle conditionFaceted
Culet sizePointed
Top View
6.52 mm7.39 mm1.23 ctJ / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 704515160
Side View
Table 58.0%Crown 35.2°Girdle: STK-THKPavilion 41.1°Culet: NoneDepth 59.9%

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: $5,378 AUD|Low: $2,003 AUD|High: $5,539 AUD|Avg: $2,791 AUD|-2.9%
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
Retailer 15
November 7, 2026
Retailer 11$2,003 AUD
Retailer 12$2,013 AUD
Retailer 10$2,045 AUD
Retailer 13$2,106 AUD
Retailer 4$2,205 AUD
Retailer 2$2,272 AUD
Retailer 7$2,272 AUD
Retailer 5$2,294 AUD
Retailer 6$2,301 AUD
Retailer 14$2,368 AUD
Retailer 9$2,432 AUD
Retailer 15$2,506 AUD
Retailer 3$2,690 AUD
Retailer 8$3,783 AUD
NZ Jewellers$5,378 AUD

31 data points across 15 retailers

15 retailers$2,003 AUD to $5,378 AUD

A
Cheapest Retailer
-
$2,003 AUD
Final sale: no returns
A
Retailer 2
-
$2,013 AUD
View
A
Retailer 3
-
$2,045 AUD
View
A
Retailer 4
-
$2,106 AUD
View
A
Retailer 5
-
$2,205 AUD
View
A
Retailer 6
-
$2,272 AUD
View
Retailer 7
-
$2,272 AUD
View
Price last confirmed 9 days ago
B+
Retailer 8
-
$2,294 AUD
View
B+
Retailer 9
-
$2,301 AUD
View
B+
Retailer 10
-
$2,368 AUD
View
A
Retailer 11
-
$2,432 AUD
View
B+
Retailer 12
-
$2,506 AUD
View
B+
Retailer 13
-
$2,690 AUD
View
B
Retailer 14
-
$3,783 AUD
View
Most Expensive
B
NZ Jewellers
8ef5a5f5-41e0-40cf-9bc2-8ee8a1456da3 · Nov 5
$5,378 AUD
$3,695 USD
View
14 more retailers have this diamond
Prices start from $2,003 AUDSave up to $3,375 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
1.23ct Heart
$2,003 AUD