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Heart|Natural|IGI

1.21ct H SI1 Heart Natural Diamond

VG • H/SI1 • IGI 732579315

Shape and cutting style on the report: Heart brilliant

Certificate IGI 732579315

Diamond specifications and retailer prices

From £1,464 GBP
As of November 5, 2026
Save £2,394 GBP (62%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £3,858 GBP at NZ Jewellers · As of November 5, 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 H colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 732579315. Listed at 7 retailers as of November 5, 2026, with prices from £1,464 to £3,858, a £2,394 spread on the same certified stone. NZ Jewellers lists it at £3,858. 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
H
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle41.5°
Pavilion angle39.7°
OriginNatural
Grading LabIGI
CertificateIGI 732579315
Dimensions6.32 × 7.09 × 4.41 mm
L/W Ratio1.12
Girdle conditionFaceted
Culet sizePointed
Top View
6.32 mm7.09 mm1.21 ctH / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 732579315
Side View
Table 60.0%Crown 41.5°Girdle: STK-VTKPavilion 39.7°Culet: NoneDepth 62.2%

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 5
Current: £3,858 GBP|Low: £1,349 GBP|High: £3,858 GBP|Avg: £2,105 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 5, 2026
Retailer 2£1,464 GBP
Retailer 3£1,512 GBP
Retailer 8£1,703 GBP
Retailer 11£1,800 GBP
Retailer 6£1,845 GBP
Retailer 7£1,857 GBP
Retailer 10£1,929 GBP
Retailer 5£1,931 GBP
Retailer 9£2,052 GBP
Retailer 4£3,224 GBP
NZ Jewellers£3,858 GBP

30 data points across 11 retailers

7 retailers£1,464 GBP to £3,858 GBP

B+
Cheapest Retailer
-
£1,464 GBP
B+
Retailer 2
-
£1,703 GBP
View
Final sale: no returns
B
Retailer 3
-
£1,845 GBP
View
B+
Retailer 4
-
£1,857 GBP
View
B
Retailer 5
-
£1,931 GBP
View
C
Retailer 6
-
£3,224 GBP
View
Most Expensive
C
NZ Jewellers
f2383d6c-82f1-461d-b5a2-aad7d4d6f7d5 · Nov 5
£3,858 GBP
$5,164 USD
View
6 more retailers have this diamond
Prices start from £1,464 GBPSave up to £2,394 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
£1,464 GBP