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Round|Natural|GIA

1.02ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 1559589355

Certificate GIA 1559589355

Diamond specifications and retailer prices

From $3,058 NZD
As of November 6, 2026
Save $2,286 NZD (43%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $7,459 NZD at NZ Jewellers · As of October 3, 2026
View at NZ Jewellers

About this 1.02ct natural round diamond

This 1.02ct natural round sits in the classic one-carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1559589355. Listed at 11 retailers as of November 4, 2026, with a 75% 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

1.02
Carat
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 1559589355
Dimensions6.43 × 6.41 × 4.01 mm
L/W Ratio1.00
Star length50%
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Needle
Top View
6.43 mm6.41 mm1.02 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1559589355
Side View
Table 57.0%Crown 35.5°Girdle: THN-STKPavilion 41°Culet: NoneDepth 62.5%

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 6
Current: $3,373 NZD|Low: $3,058 NZD|High: $5,648 NZD|Avg: $3,948 NZD|-0.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 6$3,058 NZD
Retailer 1$3,373 NZD
Retailer 2$3,642 NZD
Retailer 4$3,732 NZD
Retailer 3$4,144 NZD
Retailer 5$5,343 NZD

44 data points across 6 retailers

11 retailers$3,058 NZD to $5,343 NZD

A
Cheapest Retailer
-
$3,058 NZD
Retailer 2
-
$3,058 NZD
View
Price last confirmed 29 days ago
Retailer 3
-
$3,058 NZD
View
Price last confirmed 29 days ago
Retailer 4
-
$3,334 NZD
View
Price last confirmed 38 days ago
B+
Retailer 5
-
$3,373 NZD
View
Retailer 6
-
$3,528 NZD
View
Price last confirmed 35 days ago
B+
Retailer 7
-
$3,642 NZD
View
B+
Retailer 8
-
$3,732 NZD
View
B+
Retailer 9
-
$4,144 NZD
View
B
Retailer 10
-
$5,343 NZD
View
Most Expensive
NZ Jewellers
d6bcc7c3-6a43-473f-a499-0316827d6bd6 · Oct 3
$7,459 NZD
$4,135 USD
View
Price last confirmed 34 days ago
10 more retailers have this diamond
Prices start from $3,058 NZDSave up to $2,286 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
1.02ct Round
$3,058 NZD