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Heart|Natural|GIA

1.59ct K SI1 Heart Natural Diamond

EX • K/SI1 • GIA 2557582242

Certificate GIA 2557582242

Diamond specifications and retailer prices

From £2,044 GBP
As of November 1, 2026
Save £2,533 GBP (55%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £5,151 GBP at NZ Jewellers · As of September 25, 2026
View at NZ Jewellers

About this 1.59ct natural heart diamond

This 1.59ct 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 2557582242. Listed at 14 retailers as of November 1, 2026, with a 124% 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

1.59
Carat
K
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2557582242
Dimensions6.97 × 8.13 × 4.78 mm
L/W Ratio1.17
Girdle conditionFaceted
Top View
6.97 mm8.13 mm1.59 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2557582242
Side View
Table 58.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 58.8%

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: £2,619 GBP|Low: £2,037 GBP|High: £5,003 GBP|Avg: £2,886 GBP|-3.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 11£2,044 GBP
Retailer 9£2,065 GBP
Retailer 12£2,195 GBP
Retailer 7£2,233 GBP
Retailer 3£2,295 GBP
Retailer 4£2,402 GBP
Retailer 8£2,548 GBP
Retailer 1£2,619 GBP
Retailer 10£2,820 GBP
Retailer 5£3,350 GBP
Retailer 2£4,229 GBP
Retailer 6£4,577 GBP

39 data points across 12 retailers

14 retailers£2,044 GBP to £4,577 GBP

A
Cheapest Retailer
-
£2,044 GBP
A
Retailer 2
-
£2,065 GBP
View
A
Retailer 3
-
£2,195 GBP
View
A
Retailer 4
-
£2,233 GBP
View
A
Retailer 5
-
£2,295 GBP
View
Final sale: no returns
A
Retailer 6
-
£2,402 GBP
View
A
Retailer 7
-
£2,548 GBP
View
A
Retailer 8
-
£2,619 GBP
View
B+
Retailer 9
-
£2,820 GBP
View
B+
Retailer 10
-
£2,893 GBP
View
B+
Retailer 11
-
£3,350 GBP
View
B
Retailer 12
-
£4,229 GBP
View
B
Retailer 13
-
£4,577 GBP
View
Most Expensive
NZ Jewellers
a4e07a9e-3e48-4ff0-9393-b25ce73f04c1 · Sep 25
£5,151 GBP
$6,895 USD
View
Price last confirmed 42 days ago
13 more retailers have this diamond
Prices start from £2,044 GBPSave up to £2,533 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
1.59ct Heart
£2,044 GBP