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Heart|Natural|IGI

1.23ct G VVS1 Heart Natural Diamond

VG • G/VVS1 • IGI 851618603

Shape and cutting style on the report: Heart brilliant

Certificate IGI 851618603

Diamond specifications and retailer prices

From $4,657 AUD
As of November 6, 2026
Save $6,284 AUD (57%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $10,942 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 G colour (near-colourless) and VVS1 clarity (very-very-slightly-included), with a very-good cut grade and certified by IGI 851618603. Listed at 12 retailers as of November 5, 2026, with prices from $4,657 to $10,942, a $6,284 spread on the same certified stone. NZ Jewellers lists it at $10,942. 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
G
Colour
VVS1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.1°
Pavilion angle39.5°
OriginNatural
Grading LabIGI
CertificateIGI 851618603
Dimensions6.59 × 7.26 × 4.43 mm
L/W Ratio1.10
Girdle conditionFaceted
Top View
6.59 mm7.26 mm1.23 ctG / VVS1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 851618603
Side View
Table 54.0%Crown 33.1°Girdle: STK-THKPavilion 39.5°CuletDepth 61.0%

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: $10,942 AUD|Low: $4,657 AUD|High: $10,942 AUD|Avg: $6,612 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 7, 2026
Retailer 6$4,657 AUD
Retailer 3$5,088 AUD
Retailer 10$5,580 AUD
Retailer 7$5,720 AUD
Retailer 11$5,797 AUD
Retailer 9$6,280 AUD
Retailer 12$6,280 AUD
Retailer 5$6,543 AUD
Retailer 8$6,640 AUD
Retailer 4$7,246 AUD
Retailer 2$9,949 AUD
NZ Jewellers$10,942 AUD

5 data points across 12 retailers

12 retailers$4,657 AUD to $10,942 AUD

A
Cheapest Retailer
-
$4,657 AUD
A
Retailer 2
-
$5,088 AUD
View
B+
Retailer 3
-
$5,580 AUD
View
B+
Retailer 4
-
$5,720 AUD
View
B+
Retailer 5
-
$5,797 AUD
View
Final sale: no returns
B+
Retailer 6
-
$6,280 AUD
View
B+
Retailer 7
-
$6,280 AUD
View
B+
Retailer 8
-
$6,543 AUD
View
B+
Retailer 9
-
$6,640 AUD
View
B
Retailer 10
-
$7,246 AUD
View
B
Retailer 11
-
$9,949 AUD
View
Most Expensive
B
NZ Jewellers
d3ccc593-a6fa-4142-850b-d3d27c1aa763 · Nov 5
$10,942 AUD
$7,518 USD
View
11 more retailers have this diamond
Prices start from $4,657 AUDSave up to $6,284 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
$4,657 AUD