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Heart|Natural|GIA

1.51ct H SI2 Heart Natural Diamond

ID • H/SI2 • GIA 6555596845

Certificate GIA 6555596845

Diamond specifications and retailer prices

From £2,442 GBP
$3,277 USD
As of November 1, 2026
Save £2,341 GBP (49%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £5,135 GBP at NZ Jewellers · As of September 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 6555596845. Listed at 14 retailers as of November 1, 2026, with a 96% 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
SI2
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.72°
Pavilion angle40.21°
OriginNatural
Grading LabGIA
CertificateGIA 6555596845
Dimensions7.95 × 7.20 × 4.51 mm
L/W Ratio1.10
Culet sizeNone
Key to symbols
Twinning Wisp, Feather
Top View
7.95 mm7.20 mm1.51 ctH / SI2
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6555596845
Side View
Table 58.0%Crown 35.72°Girdle: Very ThickPavilion 40.21°Culet: NoneDepth 56.7%

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: £3,347 GBP|Low: £2,130 GBP|High: £4,989 GBP|Avg: £3,142 GBP|+3.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 7£2,442 GBP
Retailer 6£2,539 GBP
Retailer 8£2,639 GBP
Retailer 5£2,695 GBP
Retailer 2£2,926 GBP
Retailer 9£2,948 GBP
Retailer 3£2,969 GBP
Retailer 1£3,347 GBP
Retailer 4£4,783 GBP

43 data points across 9 retailers

14 retailers£2,442 GBP to £4,783 GBP

A
Cheapest Retailer
-
£2,442 GBP
$3,277 USD
A
Retailer 2
-
£2,539 GBP
$3,407 USD
View
A
Retailer 3
-
£2,639 GBP
$3,542 USD
View
Final sale: no returns
A
Retailer 4
-
£2,695 GBP
$3,616 USD
View
A
Retailer 5
-
£2,926 GBP
View
Retailer 6
-
£2,948 GBP
$3,956 USD
View
Price last confirmed 32 days ago
Retailer 7
-
£2,948 GBP
$3,956 USD
View
Price last confirmed 32 days ago
Retailer 8
-
£2,948 GBP
$3,956 USD
View
Price last confirmed 17 days ago
A
Retailer 9
-
£2,969 GBP
$3,985 USD
View
B+
Retailer 10
-
£3,347 GBP
€4,278 EUR
View
Retailer 11
-
£3,401 GBP
$4,564 USD
View
Price last confirmed 56 days ago
Retailer 12
-
£3,401 GBP
$4,564 USD
View
Price last confirmed 34 days ago
B+
Retailer 13
-
£4,783 GBP
View
Most Expensive
NZ Jewellers
2bd519f8-8648-43a3-bbdc-d59aafb399bf · Sep 30
£5,135 GBP
$6,891 USD
View
Price last confirmed 33 days ago
13 more retailers have this diamond
Prices start from £2,442 GBPSave up to £2,341 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
£2,442 GBP