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Heart|Natural|IGI

1.51ct K SI1 Heart Natural Diamond

VG • K/SI1 • IGI 773617467

Shape and cutting style on the report: Heart brilliant

Certificate IGI 773617467

Diamond specifications and retailer prices

From £1,292 GBP
As of November 4, 2026
Save £2,167 GBP (63%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £3,459 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 K colour (faint-tinted) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 773617467. Listed at 14 retailers as of November 4, 2026, with prices from £1,292 to £3,459, a £2,167 spread on the same certified stone. NZ Jewellers lists it at £3,459. 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
K
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39°
Pavilion angle39.6°
OriginNatural
Grading LabIGI
CertificateIGI 773617467
Dimensions6.46 × 7.80 × 5.02 mm
L/W Ratio1.21
Girdle conditionFaceted
Top View
6.46 mm7.80 mm1.51 ctK / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 773617467
Side View
Table 56.0%Crown 39°Girdle: STK-THKPavilion 39.6°CuletDepth 64.4%

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 4
Current: £3,459 GBP|Low: £1,292 GBP|High: £3,621 GBP|Avg: £1,858 GBP|+6.7%
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 11£1,292 GBP
Retailer 10£1,341 GBP
Retailer 2£1,375 GBP
Retailer 8£1,418 GBP
Retailer 5£1,441 GBP
Retailer 13£1,484 GBP
Retailer 4£1,485 GBP
Retailer 6£1,520 GBP
Retailer 7£1,566 GBP
Retailer 3£1,636 GBP
Retailer 9£1,730 GBP
Retailer 12£2,477 GBP
NZ Jewellers£3,459 GBP

38 data points across 13 retailers

14 retailers£1,292 GBP to £3,459 GBP

A
Cheapest Retailer
-
£1,292 GBP
A
Retailer 2
-
£1,341 GBP
View
A
Retailer 3
-
£1,375 GBP
View
A
Retailer 4
-
£1,418 GBP
View
B+
Retailer 5
-
£1,441 GBP
View
B+
Retailer 6
-
£1,484 GBP
View
Retailer 7
-
£1,485 GBP
View
Price last confirmed 8 days ago
Retailer 8
-
£1,485 GBP
View
Price last confirmed 21 days ago
B+
Retailer 9
-
£1,520 GBP
View
B+
Retailer 10
-
£1,566 GBP
View
B+
Retailer 11
-
£1,636 GBP
View
B+
Retailer 12
-
£1,730 GBP
View
B+
Retailer 13
-
£2,477 GBP
View
Most Expensive
B
NZ Jewellers
adefc08f-653b-44a9-92f3-95acbb36c18e · Nov 5
£3,459 GBP
$4,630 USD
View
13 more retailers have this diamond
Prices start from £1,292 GBPSave up to £2,167 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
£1,292 GBP