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Heart|Natural|IGI

1.20ct G SI1 Heart Natural Diamond

VG • G/SI1 • IGI 800626000

Shape and cutting style on the report: Heart brilliant

Certificate IGI 800626000

Diamond specifications and retailer prices

From £1,601 GBP
As of November 6, 2026
Save £2,104 GBP (57%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £3,705 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 G colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 800626000. Listed at 13 retailers as of November 5, 2026, with prices from £1,601 to £3,705, a £2,104 spread on the same certified stone. NZ Jewellers lists it at £3,705. 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
G
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.6°
Pavilion angle38.8°
OriginNatural
Grading LabIGI
CertificateIGI 800626000
Dimensions6.35 × 7.38 × 4.30 mm
L/W Ratio1.16
Girdle conditionFaceted
Culet sizeNone
Top View
6.35 mm7.38 mm1.20 ctG / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 800626000
Side View
Table 62.0%Crown 36.6°Girdle: STK-THKPavilion 38.8°Culet: NoneDepth 58.3%

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: £3,705 GBP|Low: £1,601 GBP|High: £3,813 GBP|Avg: £2,072 GBP|-2.8%
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
November 6, 2026
Retailer 3£1,601 GBP
Retailer 4£1,635 GBP
Retailer 2£1,719 GBP
Retailer 5£1,722 GBP
Retailer 13£1,767 GBP
Retailer 8£1,772 GBP
Retailer 10£1,772 GBP
Retailer 11£1,854 GBP
Retailer 6£1,908 GBP
Retailer 12£2,045 GBP
Retailer 7£2,163 GBP
Retailer 9£3,097 GBP
NZ Jewellers£3,705 GBP

29 data points across 13 retailers

13 retailers£1,601 GBP to £3,705 GBP

A
Cheapest Retailer
-
£1,601 GBP
A
Retailer 2
-
£1,635 GBP
View
Final sale: no returns
B+
Retailer 3
-
£1,719 GBP
View
B+
Retailer 4
-
£1,722 GBP
View
B+
Retailer 5
-
£1,767 GBP
View
B+
Retailer 6
-
£1,772 GBP
View
Retailer 7
-
£1,772 GBP
View
Price last confirmed 9 days ago
B+
Retailer 8
-
£1,854 GBP
View
B+
Retailer 9
-
£1,908 GBP
View
B+
Retailer 10
-
£2,045 GBP
View
B+
Retailer 11
-
£2,163 GBP
View
B
Retailer 12
-
£3,097 GBP
View
Most Expensive
B
NZ Jewellers
b104df6b-e2fb-4ddc-95b5-384121951bcc · Nov 5
£3,705 GBP
$4,959 USD
View
12 more retailers have this diamond
Prices start from £1,601 GBPSave up to £2,104 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
£1,601 GBP