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Heart|Natural|GIA

1.51ct F SI2 Heart Natural Diamond

EX • F/SI2 • GIA 6542728816

Certificate GIA 6542728816

Diamond specifications and retailer prices

From £2,582 GBP
As of November 6, 2026
Save £2,834 GBP (52%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £6,329 GBP at Queensmith · As of October 28, 2026
View at Queensmith

About this 1.51ct natural heart diamond

This 1.51ct natural heart sits in the one-and-a-half to two carat band, graded F colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6542728816. Listed at 16 retailers as of November 4, 2026, with a 110% 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
F
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6542728816
Dimensions7.06 × 8.02 × 4.60 mm
L/W Ratio1.14
Top View
7.06 mm8.02 mm1.51 ctF / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6542728816
Side View
Table 62.0%CrownGirdle: THN-VTKPavilionCulet: NoneDepth 57.4%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £6,329 GBP|Low: £2,553 GBP|High: £6,452 GBP|Avg: £3,857 GBP|-1.9%
Queensmith
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 6£2,582 GBP
Retailer 2£2,747 GBP
Retailer 7£3,147 GBP
Retailer 9£3,281 GBP
Retailer 4£3,321 GBP
Retailer 3£3,357 GBP
Retailer 8£3,521 GBP
Retailer 5£5,416 GBP
Queensmith£6,329 GBP

41 data points across 9 retailers

16 retailers£2,582 GBP to £5,416 GBP

A
Cheapest Retailer
-
£2,582 GBP
A
Retailer 2
-
£2,747 GBP
View
A
Retailer 3
-
£3,147 GBP
View
Final sale: no returns
A
Retailer 4
-
£3,281 GBP
View
A
Retailer 5
-
£3,321 GBP
View
A
Retailer 6
-
£3,357 GBP
View
Retailer 7
-
£3,410 GBP
View
Price last confirmed 22 days ago
Retailer 8
-
£3,410 GBP
View
Price last confirmed 22 days ago
Retailer 9
-
£3,410 GBP
View
Price last confirmed 20 days ago
A
Retailer 10
-
£3,434 GBP
View
A
Retailer 11
-
£3,521 GBP
View
B+
Retailer 12
-
£3,621 GBP
View
Retailer 13
-
£3,934 GBP
View
Price last confirmed 19 days ago
B+
Retailer 14
-
£5,416 GBP
View
Retailer 15
-
£5,940 GBP
View
Price last confirmed 20 days ago
Most Expensive
Queensmith
6542728816 · Oct 28
£6,329 GBP
View
Price last confirmed 9 days ago
15 more retailers have this diamond
Prices start from £2,582 GBPSave up to £2,834 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
£2,582 GBP