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Heart|Natural|HRD

1.21ct K SI2 Heart Natural Diamond

K/SI2 • HRD 260000134464

Certificate HRD 260000134464

Diamond specifications and retailer prices

From $2,059 AUD
As of November 6, 2026
Save $1,837 AUD (47%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $5,440 AUD at NZ Jewellers · As of October 24, 2026
View at NZ Jewellers

About this 1.21ct natural heart diamond

This 1.21ct natural heart sits in the classic one-carat band, graded K colour (faint-tinted) and SI2 clarity (slightly-included) and certified by HRD 260000134464. Listed at 6 retailers as of November 4, 2026, with a 89% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.21
Carat
K
Colour
SI2
Clarity
-
Cut

Specifications

Cut
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabHRD
CertificateHRD 260000134464
Dimensions6.53 × 7.24 × 4.23 mm
L/W Ratio1.11
Girdle conditionFaceted
Top View
6.53 mm7.24 mm1.21 ctK / SI2
OriginNatural
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateHRD 260000134464
Side View
Table 60.0%CrownGirdle: ThickPavilionCulet: NoneDepth 58.4%

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 6
Current: $5,440 AUD|Low: $1,733 AUD|High: $5,440 AUD|Avg: $3,163 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 7$1,733 AUD
Retailer 5$2,059 AUD
Retailer 6$2,343 AUD
Retailer 2$2,930 AUD
Retailer 4$3,238 AUD
Retailer 3$3,896 AUD
NZ Jewellers$5,440 AUD

23 data points across 7 retailers

6 retailers$2,059 AUD to $3,896 AUD

B+
Cheapest Retailer
-
$2,059 AUD
Final sale: no returns
B+
Retailer 2
-
$2,343 AUD
View
B+
Retailer 3
-
$2,930 AUD
View
B
Retailer 4
-
$3,238 AUD
View
B
Retailer 5
-
$3,896 AUD
View
Most Expensive
NZ Jewellers
dbdb4441-7847-4045-9be3-29d46c5a435d · Oct 24
$5,440 AUD
$3,738 USD
View
Price last confirmed 13 days ago
5 more retailers have this diamond
Prices start from $2,059 AUDSave up to $1,837 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.

B+
1.21ct Heart
$2,059 AUD