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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 $2,736 USD
As of November 1, 2026
Save $3,390 USD (55%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $6,895 USD 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
Color
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
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $3,505 USD|Low: $2,726 USD|High: $6,697 USD|Avg: $3,863 USD|-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$2,736 USD
Retailer 9$2,764 USD
Retailer 12$2,938 USD
Retailer 7$2,989 USD
Retailer 3$3,072 USD
Retailer 4$3,215 USD
Retailer 8$3,410 USD
Retailer 1$3,505 USD
Retailer 10$3,774 USD
Retailer 5$4,484 USD
Retailer 2$5,661 USD
Retailer 6$6,126 USD

39 data points across 12 retailers

14 retailers$2,736 USD to $6,126 USD

A
Cheapest Retailer
-
$2,736 USD
A
Retailer 2
-
$2,764 USD
View
A
Retailer 3
-
$2,938 USD
View
A
Retailer 4
-
$2,989 USD
View
A
Retailer 5
-
$3,072 USD
View
Final sale: no returns
A
Retailer 6
-
$3,215 USD
View
A
Retailer 7
-
$3,410 USD
View
A
Retailer 8
-
$3,505 USD
View
B+
Retailer 9
-
$3,774 USD
View
B+
Retailer 10
-
$3,872 USD
View
B+
Retailer 11
-
$4,484 USD
View
B
Retailer 12
-
$5,661 USD
View
B
Retailer 13
-
$6,126 USD
View
Most Expensive
NZ Jewellers
a4e07a9e-3e48-4ff0-9393-b25ce73f04c1 · Sep 25
$6,895 USD
View
Price last confirmed 42 days ago
13 more retailers have this diamond
Prices start from $2,736 USDSave up to $3,390 USD

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
$2,736 USD