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Heart|Natural|GIA

1.51ct J SI2 Heart Natural Diamond

EX • J/SI2 • GIA 7456939844

Certificate GIA 7456939844

Diamond specifications and retailer prices

From £1,956 GBP
$2,621 USD
As of November 1, 2026
Save £2,507 GBP (56%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £4,643 GBP at NZ Jewellers · As of October 24, 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 SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 7456939844. Listed at 13 retailers as of October 26, 2026, with a 128% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
J
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle46.5°
Pavilion angle37.97°
OriginNatural
Grading LabGIA
CertificateGIA 7456939844
Dimensions6.64 × 7.87 × 4.77 mm
L/W Ratio1.19
Top View
6.64 mm7.87 mm1.51 ctJ / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 7456939844
Side View
Table 62.0%Crown 46.5°Girdle: THN-THKPavilion 37.97°Culet: NoneDepth 60.6%

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 1
Current: £4,643 GBP|Low: £1,956 GBP|High: £4,643 GBP|Avg: £2,850 GBP
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
Retailer 16
Retailer 17
Retailer 18
Retailer 19
October 27, 2026
Retailer 17£1,956 GBP
Retailer 18£2,093 GBP
Retailer 19£2,155 GBP
Retailer 10£2,310 GBP
Retailer 14£2,414 GBP
Retailer 15£2,508 GBP
Retailer 11£2,587 GBP
Retailer 16£2,618 GBP
Retailer 12£2,669 GBP
Retailer 8£2,694 GBP
Retailer 4£2,769 GBP
Retailer 5£2,769 GBP
Retailer 2£2,813 GBP
Retailer 7£2,855 GBP
Retailer 3£2,858 GBP
Retailer 6£3,024 GBP
Retailer 9£3,701 GBP
Retailer 13£4,463 GBP
NZ Jewellers£4,643 GBP

19 data points across 19 retailers

13 retailers£1,956 GBP to £4,463 GBP

A
Cheapest Retailer
-
£1,956 GBP
$2,621 USD
A
Retailer 2
-
£2,093 GBP
$2,804 USD
View
A
Retailer 3
-
£2,155 GBP
$2,888 USD
View
Retailer 4
-
£2,414 GBP
$3,235 USD
View
Price last confirmed 7 days ago
Retailer 5
-
£2,508 GBP
$3,360 USD
View
Price last confirmed 7 days ago
B+
Retailer 6
-
£2,618 GBP
$3,508 USD
View
B+
Retailer 7
-
£2,669 GBP
View
B+
Retailer 8
-
£2,769 GBP
$3,710 USD
View
B+
Retailer 9
-
£2,769 GBP
$3,710 USD
View
B+
Retailer 10
-
£2,813 GBP
$3,769 USD
View
B+
Retailer 11
-
£2,858 GBP
$3,830 USD
View
B
Retailer 12
-
£4,463 GBP
View
Most Expensive
NZ Jewellers
5ff0a33f-bce3-4bc9-b74d-835c40274907 · Oct 24
£4,643 GBP
$6,221 USD
View
Price last confirmed 9 days ago
12 more retailers have this diamond
Prices start from £1,956 GBPSave up to £2,507 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
£1,956 GBP