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Heart|Natural|IGI

1.51ct G SI1 Heart Natural Diamond

VG • G/SI1 • IGI 801639168

Shape and cutting style on the report: Heart brilliant

Certificate IGI 801639168

Diamond specifications and retailer prices

From £2,453 GBP
As of November 5, 2026
Save £2,361 GBP (49%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £4,814 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 G colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 801639168. Listed at 15 retailers as of November 5, 2026, with prices from £2,453 to £4,814, a £2,361 spread on the same certified stone. NZ Jewellers lists it at £4,814. 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
G
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle36.5°
Pavilion angle41.3°
OriginNatural
Grading LabIGI
CertificateIGI 801639168
Dimensions7.04 × 7.68 × 4.70 mm
L/W Ratio1.09
Girdle conditionFaceted
Top View
7.04 mm7.68 mm1.51 ctG / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateIGI 801639168
Side View
Table 61.0%Crown 36.5°Girdle: STK-THKPavilion 41.3°Culet: NoneDepth 61.2%

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 5
Current: £4,814 GBP|Low: £2,453 GBP|High: £5,013 GBP|Avg: £3,111 GBP|-4.0%
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 7, 2026
Retailer 14£2,453 GBP
Retailer 3£2,550 GBP
Retailer 9£2,589 GBP
Retailer 7£2,603 GBP
Retailer 8£2,649 GBP
Retailer 13£2,763 GBP
Retailer 4£2,870 GBP
Retailer 11£2,872 GBP
Retailer 6£2,877 GBP
Retailer 2£2,911 GBP
Retailer 5£3,188 GBP
Retailer 10£3,217 GBP
Retailer 12£3,372 GBP
Retailer 15£4,608 GBP
NZ Jewellers£4,814 GBP

19 data points across 15 retailers

15 retailers£2,453 GBP to £4,814 GBP

A
Cheapest Retailer
-
£2,453 GBP
A
Retailer 2
-
£2,550 GBP
View
Final sale: no returns
A
Retailer 3
-
£2,589 GBP
View
A
Retailer 4
-
£2,603 GBP
View
A
Retailer 5
-
£2,649 GBP
View
A
Retailer 6
-
£2,763 GBP
View
A
Retailer 7
-
£2,870 GBP
View
A
Retailer 8
-
£2,872 GBP
View
Retailer 9
-
£2,877 GBP
View
Price last confirmed 9 days ago
A
Retailer 10
-
£2,911 GBP
View
A
Retailer 11
-
£3,188 GBP
View
A
Retailer 12
-
£3,217 GBP
View
A
Retailer 13
-
£3,372 GBP
View
B+
Retailer 14
-
£4,608 GBP
View
Most Expensive
B
NZ Jewellers
486ccb40-1214-460a-8f96-964fb2254931 · Nov 5
£4,814 GBP
$6,443 USD
View
14 more retailers have this diamond
Prices start from £2,453 GBPSave up to £2,361 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
£2,453 GBP