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Heart|Natural|GIA

1.51ct H SI1 Heart Natural Diamond

EX • H/SI1 • GIA 7546607780

Certificate GIA 7546607780

Diamond specifications and retailer prices

From £3,027 GBP
$4,062 USD
As of November 1, 2026
Save £3,241 GBP (52%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £7,206 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 H 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 7546607780. Listed at 21 retailers as of November 1, 2026, with a 107% 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
H
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 7546607780
Dimensions6.80 × 7.95 × 4.72 mm
L/W Ratio1.17
Girdle conditionFaceted
Top View
6.80 mm7.95 mm1.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 7546607780
Side View
Table 59.0%CrownGirdle: MED-THKPavilion 41.2°Culet: NoneDepth 59.3%

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: £3,711 GBP|Low: £2,990 GBP|High: £6,755 GBP|Avg: £4,061 GBP|-2.2%
Retailer 1
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
November 2, 2026
Retailer 17£3,027 GBP
Retailer 12£3,043 GBP
Retailer 16£3,209 GBP
Retailer 14£3,335 GBP
Retailer 7£3,394 GBP
Retailer 2£3,406 GBP
Retailer 8£3,428 GBP
Retailer 5£3,433 GBP
Retailer 4£3,620 GBP
Retailer 1£3,711 GBP
Retailer 11£3,825 GBP
Retailer 15£3,892 GBP
Retailer 9£4,103 GBP
Retailer 10£4,209 GBP
Retailer 3£4,936 GBP
Retailer 13£5,000 GBP
Retailer 18£6,268 GBP
Retailer 6£6,370 GBP

25 data points across 18 retailers

21 retailers£3,027 GBP to £6,268 GBP

A
Cheapest Retailer
-
£3,027 GBP
$4,062 USD
A
Retailer 2
-
£3,043 GBP
HK$31,900 HKD
View
A
Retailer 3
-
£3,209 GBP
$4,306 USD
View
B+
Retailer 4
-
£3,335 GBP
$4,476 USD
View
Final sale: no returns
A
Retailer 5
-
£3,394 GBP
$4,555 USD
View
A
Retailer 6
-
£3,406 GBP
€4,353 EUR
View
A
Retailer 7
-
£3,428 GBP
$4,600 USD
View
A
Retailer 8
-
£3,433 GBP
$4,607 USD
View
B+
Retailer 9
-
£3,620 GBP
$4,858 USD
View
B+
Retailer 10
-
£3,711 GBP
$4,980 USD
View
B+
Retailer 11
-
£3,825 GBP
$5,133 USD
View
Retailer 12
-
£3,850 GBP
$5,167 USD
View
Price last confirmed 12 days ago
B+
Retailer 13
-
£3,892 GBP
View
B+
Retailer 14
-
£4,103 GBP
SGD 7,441 SGD
View
Retailer 15
-
£4,209 GBP
A$8,689 AUD
View
Price last confirmed 23 days ago
B
Retailer 16
-
£4,431 GBP
A$9,148 AUD
View
B+
Retailer 17
-
£4,936 GBP
ZAR 107,001 ZAR
View
B+
Retailer 18
-
£5,000 GBP
$6,710 USD
View
B
Retailer 19
-
£6,268 GBP
View
Retailer 20
-
£6,370 GBP
$8,548 USD
View
Price last confirmed 9 days ago
Most Expensive
NZ Jewellers
dbf135a3-0579-43ef-9381-30a46e39cd96 · Sep 25
£7,206 GBP
$9,670 USD
View
Price last confirmed 38 days ago
20 more retailers have this diamond
Prices start from £3,027 GBPSave up to £3,241 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
£3,027 GBP