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Heart|Natural|GIA

1.51ct K SI1 Heart Natural Diamond

EX • K/SI1 • GIA 2548532604

Certificate GIA 2548532604

Diamond specifications and retailer prices

From £1,806 GBP
As of November 6, 2026
Save £355 GBP (16%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £2,161 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 K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2548532604. Listed at 7 retailers as of November 5, 2026, with prices from £1,806 to £2,161, a £355 spread on the same certified stone. Blue Nile lists it at £2,161. 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
K
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2548532604
Dimensions6.75 × 8.07 × 4.84 mm
L/W Ratio1.20
Top View
6.75 mm8.07 mm1.51 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2548532604
Side View
Table 61.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 60.0%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 6
Current: £2,161 GBP|Low: £1,662 GBP|High: £2,486 GBP|Avg: £2,048 GBP|-13.1%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 5£1,806 GBP
Retailer 4£1,828 GBP
Retailer 7£1,852 GBP
Retailer 2£1,898 GBP
Retailer 3£1,940 GBP
Retailer 6£2,099 GBP
Blue Nile£2,161 GBP

42 data points across 7 retailers

7 retailers£1,806 GBP to £2,161 GBP

A
Cheapest Retailer
-
£1,806 GBP
A
Retailer 2
-
£1,828 GBP
View
Final sale: no returns
A
Retailer 3
-
£1,852 GBP
View
A
Retailer 4
-
£1,898 GBP
View
A
Retailer 5
-
£1,940 GBP
View
A
Retailer 6
-
£2,099 GBP
View
Most Expensive
A
Blue Nile
28033762 · Nov 5
£2,161 GBP
$2,892 USD
View
6 more retailers have this diamond
Prices start from £1,806 GBPSave up to £355 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
£1,806 GBP