CaratHunter
Plans
Heart|Natural|GIA

1.59ct K SI1 Heart Natural Diamond

EX • K/SI1 • GIA 2557582242

Certificate GIA 2557582242

Diamond specifications and retailer prices

From $3,506 SGD
As of November 1, 2026
Save $4,345 SGD (55%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $8,837 SGD 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: $4,492 SGD|Low: $3,494 SGD|High: $8,583 SGD|Avg: $4,951 SGD|-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$3,506 SGD
Retailer 9$3,542 SGD
Retailer 12$3,765 SGD
Retailer 7$3,831 SGD
Retailer 3$3,937 SGD
Retailer 4$4,120 SGD
Retailer 8$4,370 SGD
Retailer 1$4,492 SGD
Retailer 10$4,837 SGD
Retailer 5$5,747 SGD
Retailer 2$7,255 SGD
Retailer 6$7,851 SGD

39 data points across 12 retailers

14 retailers$3,506 SGD to $7,851 SGD

A
Cheapest Retailer
-
$3,506 SGD
A
Retailer 2
-
$3,542 SGD
View
A
Retailer 3
-
$3,765 SGD
View
A
Retailer 4
-
$3,831 SGD
View
A
Retailer 5
-
$3,937 SGD
View
Final sale: no returns
A
Retailer 6
-
$4,120 SGD
View
A
Retailer 7
-
$4,370 SGD
View
A
Retailer 8
-
$4,492 SGD
View
B+
Retailer 9
-
$4,837 SGD
View
B+
Retailer 10
-
$4,962 SGD
View
B+
Retailer 11
-
$5,747 SGD
View
B
Retailer 12
-
$7,255 SGD
View
B
Retailer 13
-
$7,851 SGD
View
Most Expensive
NZ Jewellers
a4e07a9e-3e48-4ff0-9393-b25ce73f04c1 · Sep 25
$8,837 SGD
$6,895 USD
View
Price last confirmed 42 days ago
13 more retailers have this diamond
Prices start from $3,506 SGDSave up to $4,345 SGD

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
$3,506 SGD