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Heart|Natural|IGI

1.31ct I SI1 Heart Natural Diamond

VG • I/SI1 • IGI 762534772

Shape and cutting style on the report: Heart brilliant

Certificate IGI 762534772

Diamond specifications and retailer prices

From £1,691 GBP
As of November 6, 2026
Save £1,629 GBP (49%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £4,096 GBP at NZ Jewellers · As of September 30, 2026
View at NZ Jewellers

About this 1.31ct natural heart diamond

This 1.31ct natural heart sits in the one-and-a-quarter to one-and-a-half carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 762534772. Listed at 16 retailers as of November 4, 2026, with a 96% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.31
Carat
I
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle34.5°
Pavilion angle38.2°
OriginNatural
Grading LabIGI
CertificateIGI 762534772
Dimensions7.00 × 7.70 × 4.32 mm
L/W Ratio1.10
Girdle conditionFaceted
Culet sizePointed
Top View
7.00 mm7.70 mm1.31 ctI / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateIGI 762534772
Side View
Table 58.0%Crown 34.5°Girdle: STK-THKPavilion 38.2°Culet: NoneDepth 56.1%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £1,729 GBP|Low: £1,691 GBP|High: £3,473 GBP|Avg: £2,229 GBP|-4.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 4£1,691 GBP
Retailer 10£1,718 GBP
Retailer 1£1,729 GBP
Retailer 11£1,848 GBP
Retailer 3£1,959 GBP
Retailer 6£1,978 GBP
Retailer 2£2,001 GBP
Retailer 7£2,016 GBP
Retailer 8£2,320 GBP
Retailer 5£2,325 GBP
Retailer 9£3,321 GBP

43 data points across 11 retailers

16 retailers£1,691 GBP to £3,321 GBP

A
Cheapest Retailer
-
£1,691 GBP
A
Retailer 2
-
£1,718 GBP
View
A
Retailer 3
-
£1,729 GBP
View
Final sale: no returns
A
Retailer 4
-
£1,848 GBP
View
Retailer 5
-
£1,959 GBP
View
Price last confirmed 37 days ago
Retailer 6
-
£1,959 GBP
View
Price last confirmed 22 days ago
B+
Retailer 7
-
£1,978 GBP
View
B+
Retailer 8
-
£2,001 GBP
View
A
Retailer 9
-
£2,016 GBP
View
Retailer 10
-
£2,034 GBP
View
Price last confirmed 37 days ago
Retailer 11
-
£2,260 GBP
View
Price last confirmed 62 days ago
Retailer 12
-
£2,260 GBP
View
Price last confirmed 39 days ago
B+
Retailer 13
-
£2,320 GBP
View
B+
Retailer 14
-
£2,325 GBP
View
B
Retailer 15
-
£3,321 GBP
View
Most Expensive
NZ Jewellers
5d6ee5f4-fb6c-488f-bf38-66a35693000d · Sep 30
£4,096 GBP
$5,482 USD
View
Price last confirmed 37 days ago
15 more retailers have this diamond
Prices start from £1,691 GBPSave up to £1,629 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
1.31ct Heart
£1,691 GBP