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Heart|Natural|GIA

1.51ct F SI1 Heart Natural Diamond

EX • F/SI1 • GIA 5553605892

Certificate GIA 5553605892

Diamond specifications and retailer prices

From £3,193 GBP
As of November 4, 2026
Save £607 GBP (16%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £3,801 GBP at Blue Nile · As of November 5, 2026
View at Blue Nile

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 SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 5553605892. Listed at 7 retailers as of November 4, 2026, with prices from £3,193 to £3,801, a £607 spread on the same certified stone. Blue Nile lists it at £3,801. 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
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 5553605892
Dimensions6.82 × 8.12 × 4.51 mm
L/W Ratio1.19
Culet sizeNone
Key to symbols
Twinning Wisp, Feather, Indented Natural
Top View
6.82 mm8.12 mm1.51 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5553605892
Side View
Table 59.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 55.6%

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 4
Current: £3,801 GBP|Low: £2,914 GBP|High: £4,385 GBP|Avg: £3,542 GBP|-13.3%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 5£3,193 GBP
Retailer 2£3,242 GBP
Retailer 4£3,302 GBP
Retailer 7£3,363 GBP
Retailer 3£3,374 GBP
Retailer 6£3,453 GBP
Blue Nile£3,801 GBP

42 data points across 7 retailers

7 retailers£3,193 GBP to £3,801 GBP

A
Cheapest Retailer
-
£3,193 GBP
A
Retailer 2
-
£3,242 GBP
View
A
Retailer 3
-
£3,302 GBP
View
Final sale: no returns
A
Retailer 4
-
£3,363 GBP
View
A
Retailer 5
-
£3,374 GBP
View
A
Retailer 6
-
£3,453 GBP
View
Most Expensive
A
Blue Nile
29530598 · Nov 5
£3,801 GBP
$5,087 USD
View
6 more retailers have this diamond
Prices start from £3,193 GBPSave up to £607 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
£3,193 GBP