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Heart|Natural|IGI

1.20ct H SI1 Heart Natural Diamond

VG • H/SI1 • IGI 828653750

Shape and cutting style on the report: Heart brilliant

Certificate IGI 828653750

Diamond specifications and retailer prices

From £1,554 GBP
As of November 6, 2026
Save £2,114 GBP (58%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £3,668 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 H colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 828653750. Listed at 15 retailers as of November 5, 2026, with prices from £1,554 to £3,668, a £2,114 spread on the same certified stone. NZ Jewellers lists it at £3,668. 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
H
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle42°
OriginNatural
Grading LabIGI
CertificateIGI 828653750
Dimensions6.15 × 7.24 × 4.55 mm
L/W Ratio1.18
Girdle conditionFaceted
Culet sizeNone
Top View
6.15 mm7.24 mm1.20 ctH / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 828653750
Side View
Table 61.0%Crown 35.5°Girdle: STK-THKPavilion 42°Culet: NoneDepth 62.8%

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: £3,668 GBP|Low: £1,554 GBP|High: £3,743 GBP|Avg: £2,036 GBP|-2.0%
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
Retailer 15
November 6, 2026
Retailer 8£1,554 GBP
Retailer 2£1,588 GBP
Retailer 9£1,668 GBP
Retailer 5£1,716 GBP
Retailer 15£1,752 GBP
Retailer 3£1,755 GBP
Retailer 7£1,790 GBP
Retailer 10£1,824 GBP
Retailer 4£1,836 GBP
Retailer 6£1,846 GBP
Retailer 11£1,901 GBP
Retailer 12£1,985 GBP
Retailer 13£2,141 GBP
Retailer 14£3,065 GBP
NZ Jewellers£3,668 GBP

14 data points across 15 retailers

15 retailers£1,554 GBP to £3,668 GBP

A
Cheapest Retailer
-
£1,554 GBP
B+
Retailer 2
-
£1,588 GBP
View
Final sale: no returns
B+
Retailer 3
-
£1,668 GBP
View
B+
Retailer 4
-
£1,716 GBP
View
B+
Retailer 5
-
£1,752 GBP
View
B+
Retailer 6
-
£1,755 GBP
View
Retailer 7
-
£1,790 GBP
View
Price last confirmed 9 days ago
B+
Retailer 8
-
£1,824 GBP
View
B+
Retailer 9
-
£1,836 GBP
View
B+
Retailer 10
-
£1,846 GBP
View
B+
Retailer 11
-
£1,901 GBP
View
B+
Retailer 12
-
£1,985 GBP
View
B
Retailer 13
-
£2,141 GBP
View
B
Retailer 14
-
£3,065 GBP
View
Most Expensive
B
NZ Jewellers
05724fd7-2c60-418b-ab97-b3717312dcc7 · Nov 5
£3,668 GBP
$4,910 USD
View
14 more retailers have this diamond
Prices start from £1,554 GBPSave up to £2,114 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
£1,554 GBP