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Heart|Natural|IGI

1.20ct I SI1 Heart Natural Diamond

VG • I/SI1 • IGI 749558736

Shape and cutting style on the report: Heart brilliant

Certificate IGI 749558736

Diamond specifications and retailer prices

From £1,157 GBP
As of October 31, 2026
Save £2,492 GBP (68%) vs most expensive(unlock to see where)
16 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 749558736. Listed at 16 retailers as of October 31, 2026, with prices from £1,157 to £3,649, a £2,492 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 angle32.6°
Pavilion angle38.4°
OriginNatural
Grading LabIGI
CertificateIGI 749558736
Dimensions6.70 × 7.35 × 4.11 mm
L/W Ratio1.10
Girdle conditionFaceted
Culet sizePointed
Top View
6.70 mm7.35 mm1.20 ctI / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 749558736
Side View
Table 62.0%Crown 32.6°Girdle: STK-THKPavilion 38.4°Culet: NoneDepth 55.9%

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: Oct 31
Current: £3,649 GBP|Low: £1,157 GBP|High: £3,649 GBP|Avg: £1,845 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
November 6, 2026
Retailer 9£1,157 GBP
Retailer 4£1,381 GBP
Retailer 2£1,451 GBP
Retailer 10£1,496 GBP
Retailer 12£1,496 GBP
Retailer 11£1,565 GBP
Retailer 6£1,653 GBP
Retailer 7£1,825 GBP
Retailer 5£1,960 GBP
Retailer 3£2,208 GBP
Retailer 8£2,613 GBP
NZ Jewellers£3,649 GBP

32 data points across 12 retailers

16 retailers£1,157 GBP to £3,649 GBP

A
Cheapest Retailer
-
£1,157 GBP
B+
Retailer 2
-
£1,351 GBP
View
B+
Retailer 3
-
£1,381 GBP
View
Final sale: no returns
A
Retailer 4
-
£1,451 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
-
£1,599 GBP
View
B+
Retailer 10
-
£1,653 GBP
View
Retailer 11
-
£1,726 GBP
View
Price last confirmed 29 days ago
B+
Retailer 12
-
£1,825 GBP
View
B
Retailer 13
-
£1,960 GBP
View
B
Retailer 14
-
£2,208 GBP
View
B
Retailer 15
-
£2,613 GBP
View
Most Expensive
C
NZ Jewellers
ede8d819-5314-4d83-b522-5ab9ddfebec2 · Nov 5
£3,649 GBP
$4,884 USD
View
15 more retailers have this diamond
Prices start from £1,157 GBPSave up to £2,492 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
£1,157 GBP