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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 £1,057 GBP
As of November 4, 2026
Save £943 GBP (47%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £2,793 GBP 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
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: £2,793 GBP|Low: £890 GBP|High: £2,793 GBP|Avg: £1,626 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 7£890 GBP
Retailer 5£1,057 GBP
Retailer 6£1,203 GBP
Retailer 2£1,504 GBP
Retailer 4£1,662 GBP
Retailer 3£2,000 GBP
NZ Jewellers£2,793 GBP

24 data points across 7 retailers

6 retailers£1,057 GBP to £2,000 GBP

B+
Cheapest Retailer
-
£1,057 GBP
Final sale: no returns
B+
Retailer 2
-
£1,203 GBP
View
B+
Retailer 3
-
£1,504 GBP
View
B
Retailer 4
-
£1,662 GBP
View
B
Retailer 5
-
£2,000 GBP
View
Most Expensive
NZ Jewellers
dbdb4441-7847-4045-9be3-29d46c5a435d · Oct 24
£2,793 GBP
$3,738 USD
View
Price last confirmed 13 days ago
5 more retailers have this diamond
Prices start from £1,057 GBPSave up to £943 GBP

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
£1,057 GBP