CaratHunter
Plans
Heart|Natural|GIA

1.51ct H SI2 Heart Natural Diamond

EX • H/SI2 • GIA 6542747605

Certificate GIA 6542747605

Diamond specifications and retailer prices

From £2,266 GBP
$3,041 USD
As of November 2, 2026
Save £1,937 GBP (46%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £4,204 GBP at NZ Jewellers · As of October 30, 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 H colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6542747605. Listed at 7 retailers as of October 30, 2026, with prices from £2,266 to £4,204, a £1,937 spread on the same certified stone. NZ Jewellers lists it at £4,204. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.51
Carat
H
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40°
Pavilion angle40.46°
OriginNatural
Grading LabGIA
CertificateGIA 6542747605
Dimensions6.77 × 7.96 × 4.74 mm
L/W Ratio1.18
Top View
6.77 mm7.96 mm1.51 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6542747605
Side View
Table 61.0%Crown 40°Girdle: STK-VTKPavilion 40.46°Culet: NoneDepth 59.6%

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 2
Current: £4,204 GBP|Low: £2,266 GBP|High: £4,280 GBP|Avg: £2,940 GBP|-1.8%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 6£2,266 GBP
Retailer 2£2,338 GBP
Retailer 3£2,413 GBP
Retailer 5£2,524 GBP
Retailer 7£2,551 GBP
Retailer 8£2,690 GBP
Retailer 9£2,883 GBP
Retailer 4£4,035 GBP
NZ Jewellers£4,204 GBP

27 data points across 9 retailers

7 retailers£2,266 GBP to £4,204 GBP

A
Cheapest Retailer
-
£2,266 GBP
$3,041 USD
A
Retailer 2
-
£2,338 GBP
View
A
Retailer 3
-
£2,413 GBP
$3,238 USD
View
A
Retailer 4
-
£2,524 GBP
$3,387 USD
View
A
Retailer 5
-
£2,551 GBP
$3,423 USD
View
B+
Retailer 6
-
£4,035 GBP
View
Most Expensive
B
NZ Jewellers
692890ae-d137-41e1-bb2d-cb407d6cb858 · Oct 30
£4,204 GBP
$5,641 USD
View
6 more retailers have this diamond
Prices start from £2,266 GBPSave up to £1,937 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
£2,266 GBP