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Heart|Natural|IGI

1.20ct I SI1 Heart Natural Diamond

VG • I/SI1 • IGI 743513531

Shape and cutting style on the report: Heart brilliant

Certificate IGI 743513531

Diamond specifications and retailer prices

From £1,351 GBP
As of November 6, 2026
Save £2,298 GBP (63%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £3,649 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.2ct natural heart diamond

This 1.2ct natural heart sits in the classic one-carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 743513531. Listed at 14 retailers as of November 5, 2026, with prices from £1,351 to £3,649, a £2,298 spread on the same certified stone. NZ Jewellers lists it at £3,649. 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

1.20
Carat
I
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38°
Pavilion angle37.4°
OriginNatural
Grading LabIGI
CertificateIGI 743513531
Dimensions6.81 × 7.47 × 4.11 mm
L/W Ratio1.10
Girdle conditionFaceted
Culet sizePointed
Top View
6.81 mm7.47 mm1.20 ctI / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 743513531
Side View
Table 57.0%Crown 38°Girdle: STK-THKPavilion 37.4°Culet: NoneDepth 55.0%

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: £3,649 GBP|Low: £1,351 GBP|High: £3,649 GBP|Avg: £1,820 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
November 6, 2026
Retailer 4£1,351 GBP
Retailer 5£1,381 GBP
Retailer 2£1,451 GBP
Retailer 6£1,485 GBP
Retailer 11£1,496 GBP
Retailer 13£1,496 GBP
Retailer 3£1,524 GBP
Retailer 12£1,565 GBP
Retailer 8£1,653 GBP
Retailer 14£1,726 GBP
Retailer 9£1,825 GBP
Retailer 7£2,032 GBP
Retailer 10£2,613 GBP
NZ Jewellers£3,649 GBP

30 data points across 14 retailers

14 retailers£1,351 GBP to £3,649 GBP

A
Cheapest Retailer
-
£1,351 GBP
B+
Retailer 2
-
£1,381 GBP
View
Final sale: no returns
A
Retailer 3
-
£1,451 GBP
View
A
Retailer 4
-
£1,485 GBP
View
B+
Retailer 5
-
£1,496 GBP
View
Retailer 6
-
£1,496 GBP
View
Price last confirmed 9 days ago
B+
Retailer 7
-
£1,524 GBP
View
B+
Retailer 8
-
£1,565 GBP
View
B+
Retailer 9
-
£1,653 GBP
View
B+
Retailer 10
-
£1,726 GBP
View
B+
Retailer 11
-
£1,825 GBP
View
B
Retailer 12
-
£2,032 GBP
View
B
Retailer 13
-
£2,613 GBP
View
Most Expensive
C
NZ Jewellers
045ecf2b-a6fe-4461-baf6-c2eeecaa63b2 · Nov 5
£3,649 GBP
$4,884 USD
View
13 more retailers have this diamond
Prices start from £1,351 GBPSave up to £2,298 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.

A
1.20ct Heart
£1,351 GBP