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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 $4,935 NZD
As of November 1, 2026
Save $6,115 NZD (55%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $12,438 NZD 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: $6,323 NZD|Low: $4,917 NZD|High: $12,081 NZD|Avg: $6,968 NZD|-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$4,935 NZD
Retailer 9$4,986 NZD
Retailer 12$5,300 NZD
Retailer 7$5,392 NZD
Retailer 3$5,542 NZD
Retailer 4$5,800 NZD
Retailer 8$6,151 NZD
Retailer 1$6,323 NZD
Retailer 10$6,808 NZD
Retailer 5$8,089 NZD
Retailer 2$10,212 NZD
Retailer 6$11,051 NZD

39 data points across 12 retailers

14 retailers$4,935 NZD to $11,051 NZD

A
Cheapest Retailer
-
$4,935 NZD
A
Retailer 2
-
$4,986 NZD
View
A
Retailer 3
-
$5,300 NZD
View
A
Retailer 4
-
$5,392 NZD
View
A
Retailer 5
-
$5,542 NZD
View
Final sale: no returns
A
Retailer 6
-
$5,800 NZD
View
A
Retailer 7
-
$6,151 NZD
View
A
Retailer 8
-
$6,323 NZD
View
B+
Retailer 9
-
$6,808 NZD
View
B+
Retailer 10
-
$6,985 NZD
View
B+
Retailer 11
-
$8,089 NZD
View
B
Retailer 12
-
$10,212 NZD
View
B
Retailer 13
-
$11,051 NZD
View
Most Expensive
NZ Jewellers
a4e07a9e-3e48-4ff0-9393-b25ce73f04c1 · Sep 25
$12,438 NZD
$6,895 USD
View
Price last confirmed 42 days ago
13 more retailers have this diamond
Prices start from $4,935 NZDSave up to $6,115 NZD

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
$4,935 NZD