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Heart|Natural|GIA

1.51ct J SI1 Heart Natural Diamond

EX • J/SI1 • GIA 1242032984

Certificate GIA 1242032984

Diamond specifications and retailer prices

From £2,142 GBP
As of November 6, 2026
Save £2,698 GBP (56%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £5,474 GBP at NZ Jewellers · As of September 25, 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 top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1242032984. Listed at 14 retailers as of November 2, 2026, with a 126% 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
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1242032984
Dimensions7.79 × 6.57 × 4.88 mm
L/W Ratio1.19
Girdle conditionFaceted
Top View
7.79 mm6.57 mm1.51 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1242032984
Side View
Table 59.0%CrownGirdle: STK-VTKPavilionCulet: NDepth 62.6%

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 6
Current: £2,704 GBP|Low: £2,113 GBP|High: £5,318 GBP|Avg: £3,222 GBP|-4.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 10£2,142 GBP
Retailer 6£2,430 GBP
Retailer 8£2,613 GBP
Retailer 2£2,615 GBP
Retailer 11£2,671 GBP
Retailer 1£2,704 GBP
Retailer 5£2,734 GBP
Retailer 12£3,190 GBP
Retailer 4£3,325 GBP
Retailer 7£3,532 GBP
Retailer 3£4,497 GBP
Retailer 9£4,840 GBP

37 data points across 12 retailers

14 retailers£2,142 GBP to £4,840 GBP

A
Cheapest Retailer
-
£2,142 GBP
A
Retailer 2
-
£2,430 GBP
View
B+
Retailer 3
-
£2,613 GBP
View
A
Retailer 4
-
£2,615 GBP
View
B+
Retailer 5
-
£2,671 GBP
View
Final sale: no returns
B+
Retailer 6
-
£2,704 GBP
View
B+
Retailer 7
-
£2,734 GBP
View
B+
Retailer 8
-
£3,136 GBP
View
B+
Retailer 9
-
£3,190 GBP
View
Retailer 10
-
£3,325 GBP
View
Price last confirmed 34 days ago
B
Retailer 11
-
£3,532 GBP
View
B
Retailer 12
-
£4,497 GBP
View
B
Retailer 13
-
£4,840 GBP
View
Most Expensive
NZ Jewellers
dcac04e0-fe8a-49e0-9bfa-ded47dca4470 · Sep 25
£5,474 GBP
$7,327 USD
View
Price last confirmed 42 days ago
13 more retailers have this diamond
Prices start from £2,142 GBPSave up to £2,698 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
£2,142 GBP