CaratHunter
Plans
Heart|Natural|GIA

1.23ct K SI2 Heart Natural Diamond

EX • K/SI2 • GIA 1246072305

Certificate GIA 1246072305

Diamond specifications and retailer prices

From $1,844 AUD
As of November 6, 2026
Save $4,275 AUD (70%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $6,119 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 K colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1246072305. Listed at 11 retailers as of November 5, 2026, with prices from $1,844 to $6,119, a $4,275 spread on the same certified stone. NZ Jewellers lists it at $6,119. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.23
Carat
K
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceStrong
Pavilion angle38.99°
OriginNatural
Grading LabGIA
CertificateGIA 1246072305
Dimensions6.30 × 7.36 × 4.39 mm
L/W Ratio1.17
Key to symbols
Feather, Twinning Wisp
Top View
6.30 mm7.36 mm1.23 ctK / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceStrong
CertificateGIA 1246072305
Side View
Table 61.0%CrownGirdle: STK-VTKPavilion 38.99°Culet: NoneDepth 59.7%

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: $6,119 AUD|Low: $1,844 AUD|High: $6,558 AUD|Avg: $3,296 AUD|-6.7%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 11$1,844 AUD
Retailer 10$2,371 AUD
Retailer 8$2,508 AUD
Retailer 4$2,559 AUD
Retailer 2$2,566 AUD
Retailer 7$2,624 AUD
Retailer 3$2,784 AUD
Retailer 6$2,957 AUD
Retailer 5$3,851 AUD
Retailer 9$4,395 AUD
NZ Jewellers$6,119 AUD

30 data points across 11 retailers

11 retailers$1,844 AUD to $6,119 AUD

A
Cheapest Retailer
-
$1,844 AUD
B+
Retailer 2
-
$2,371 AUD
View
A
Retailer 3
-
$2,508 AUD
View
B+
Retailer 4
-
$2,559 AUD
View
B+
Retailer 5
-
$2,566 AUD
View
B+
Retailer 6
-
$2,624 AUD
View
B+
Retailer 7
-
$2,784 AUD
View
B+
Retailer 8
-
$2,957 AUD
View
B+
Retailer 9
-
$3,851 AUD
View
B
Retailer 10
-
$4,395 AUD
View
Most Expensive
B
NZ Jewellers
fdde17d1-cee7-4b88-852b-47df3ef7bc74 · Nov 5
$6,119 AUD
$4,204 USD
View
10 more retailers have this diamond
Prices start from $1,844 AUDSave up to $4,275 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
$1,844 AUD