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Heart|Natural|GIA

1.51ct I SI2 Heart Natural Diamond

EX • I/SI2 • GIA 2556424615

Certificate GIA 2556424615

Diamond specifications and retailer prices

From £2,526 GBP
$3,390 USD
As of November 1, 2026
Save £2,827 GBP (53%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £5,926 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 I 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 2556424615. Listed at 15 retailers as of November 1, 2026, with a 112% 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
I
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2556424615
Dimensions7.08 × 7.99 × 4.41 mm
L/W Ratio1.13
Girdle conditionFaceted
Top View
7.08 mm7.99 mm1.51 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2556424615
Side View
Table 57.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 55.1%

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: £5,926 GBP|Low: £2,497 GBP|High: £6,070 GBP|Avg: £3,586 GBP|-2.4%
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
November 2, 2026
Retailer 14£2,526 GBP
Retailer 7£2,528 GBP
Retailer 12£2,663 GBP
Retailer 4£2,822 GBP
Retailer 6£2,824 GBP
Retailer 10£2,844 GBP
Retailer 13£2,956 GBP
Retailer 2£3,152 GBP
Retailer 11£3,248 GBP
Retailer 8£3,318 GBP
Retailer 9£4,315 GBP
Retailer 5£5,228 GBP
Retailer 3£5,353 GBP
NZ Jewellers£5,926 GBP

27 data points across 14 retailers

15 retailers£2,526 GBP to £5,353 GBP

A
Cheapest Retailer
-
£2,526 GBP
$3,390 USD
A
Retailer 2
-
£2,528 GBP
HK$26,500 HKD
View
A
Retailer 3
-
£2,663 GBP
$3,574 USD
View
A
Retailer 4
-
£2,822 GBP
$3,787 USD
View
A
Retailer 5
-
£2,824 GBP
$3,790 USD
View
A
Retailer 6
-
£2,844 GBP
$3,817 USD
View
Final sale: no returns
A
Retailer 7
-
£2,956 GBP
A$6,102 AUD
View
A
Retailer 8
-
£3,152 GBP
$4,230 USD
View
A
Retailer 9
-
£3,248 GBP
View
B+
Retailer 10
-
£3,318 GBP
View
B+
Retailer 11
-
£3,491 GBP
A$7,208 AUD
View
B+
Retailer 12
-
£4,315 GBP
$5,790 USD
View
Retailer 13
-
£5,228 GBP
$7,016 USD
View
Price last confirmed 9 days ago
B
Retailer 14
-
£5,353 GBP
View
Most Expensive
NZ Jewellers
f9d93be4-a7b3-4f11-9949-bab1c55ecbc4 · Oct 24
£5,926 GBP
$7,953 USD
View
Price last confirmed 9 days ago
14 more retailers have this diamond
Prices start from £2,526 GBPSave up to £2,827 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
£2,526 GBP