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Heart|Natural|IGI

1.51ct J SI1 Heart Natural Diamond

VG • J/SI1 • IGI 801638972

Shape and cutting style on the report: Heart brilliant

Certificate IGI 801638972

Diamond specifications and retailer prices

From £1,999 GBP
As of November 5, 2026
Save £2,666 GBP (57%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £4,665 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.51ct natural heart diamond

This 1.51ct natural heart sits in the one-and-a-half to two carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 801638972. Listed at 14 retailers as of November 5, 2026, with prices from £1,999 to £4,665, a £2,666 spread on the same certified stone. NZ Jewellers lists it at £4,665. 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

1.51
Carat
J
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.8°
Pavilion angle42°
OriginNatural
Grading LabIGI
CertificateIGI 801638972
Dimensions6.37 × 8.03 × 4.75 mm
L/W Ratio1.26
Girdle conditionFaceted
Top View
6.37 mm8.03 mm1.51 ctJ / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 801638972
Side View
Table 61.0%Crown 34.8°Girdle: STK-THKPavilion 42°Culet: NoneDepth 59.2%

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 5
Current: £4,665 GBP|Low: £1,999 GBP|High: £4,665 GBP|Avg: £2,559 GBP|+15.8%
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
Retailer 14
November 6, 2026
Retailer 11£1,999 GBP
Retailer 12£2,059 GBP
Retailer 4£2,073 GBP
Retailer 6£2,131 GBP
Retailer 2£2,135 GBP
Retailer 10£2,231 GBP
Retailer 5£2,313 GBP
Retailer 14£2,317 GBP
Retailer 7£2,338 GBP
Retailer 8£2,404 GBP
Retailer 3£2,575 GBP
Retailer 9£2,723 GBP
Retailer 13£3,721 GBP
NZ Jewellers£4,665 GBP

15 data points across 14 retailers

14 retailers£1,999 GBP to £4,665 GBP

A
Cheapest Retailer
-
£1,999 GBP
A
Retailer 2
-
£2,059 GBP
View
Final sale: no returns
A
Retailer 3
-
£2,073 GBP
View
B+
Retailer 4
-
£2,131 GBP
View
A
Retailer 5
-
£2,135 GBP
View
B+
Retailer 6
-
£2,231 GBP
View
Retailer 7
-
£2,313 GBP
View
Price last confirmed 9 days ago
B+
Retailer 8
-
£2,317 GBP
View
B+
Retailer 9
-
£2,338 GBP
View
B+
Retailer 10
-
£2,404 GBP
View
B+
Retailer 11
-
£2,575 GBP
View
B+
Retailer 12
-
£2,723 GBP
View
B
Retailer 13
-
£3,721 GBP
View
Most Expensive
C
NZ Jewellers
dbf0c786-3f3a-41e0-88f3-4c80d0f0fa6c · Nov 5
£4,665 GBP
$6,244 USD
View
13 more retailers have this diamond
Prices start from £1,999 GBPSave up to £2,666 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
1.51ct Heart
£1,999 GBP