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Round|Natural|GIA

1.03ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 2566647312

Certificate GIA 2566647312

Diamond specifications and retailer prices

From $3,384 NZD
As of November 6, 2026
Save $2,749 NZD (45%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $6,133 NZD at Helzberg Diamonds · As of November 6, 2026
View at Helzberg Diamonds

About this 1.03ct natural round diamond

This 1.03ct natural round sits in the classic one-carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2566647312. Listed at 15 retailers as of November 6, 2026, with prices from $3,384 to $6,133, a $2,749 spread on the same certified stone. Helzberg Diamonds lists it at $6,133. 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

1.03
Carat
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle34°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 2566647312
Dimensions6.46 × 6.49 × 4.01 mm
L/W Ratio1.00
Culet sizeNone
Top View
6.46 mm6.49 mm1.03 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 2566647312
Side View
Table 58.0%Crown 34°Girdle: MED-STKPavilion 41.4°Culet: NoneDepth 61.9%

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: $6,133 NZD|Low: $3,384 NZD|High: $6,563 NZD|Avg: $4,452 NZD|-6.5%
Helzberg Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
November 6, 2026
Retailer 6$3,384 NZD
Retailer 2$3,395 NZD
Retailer 14$3,480 NZD
Retailer 5$3,519 NZD
Retailer 13$3,566 NZD
Retailer 10$3,698 NZD
Retailer 7$3,716 NZD
Retailer 4$3,727 NZD
Retailer 15$4,080 NZD
Retailer 8$4,329 NZD
Retailer 3$4,380 NZD
Retailer 12$4,914 NZD
Retailer 11$5,217 NZD
Retailer 9$5,576 NZD
Helzberg Diamonds$6,133 NZD

20 data points across 15 retailers

15 retailers$3,384 NZD to $6,133 NZD

A
Cheapest Retailer
-
$3,384 NZD
A
Retailer 2
-
$3,395 NZD
View
B+
Retailer 3
-
$3,480 NZD
View
B+
Retailer 4
-
$3,519 NZD
View
B+
Retailer 5
-
$3,566 NZD
View
B+
Retailer 6
-
$3,698 NZD
View
B+
Retailer 7
-
$3,716 NZD
View
B+
Retailer 8
-
$3,727 NZD
View
B+
Retailer 9
-
$4,080 NZD
View
B+
Retailer 10
-
$4,329 NZD
View
B+
Retailer 11
-
$4,380 NZD
View
B+
Retailer 12
-
$4,914 NZD
View
B
Retailer 13
-
$5,217 NZD
View
B
Retailer 14
-
$5,576 NZD
View
Most Expensive
B
Helzberg Diamonds
XZRILMMMKNJHI · Nov 6
$6,133 NZD
$3,400 USD
View
14 more retailers have this diamond
Prices start from $3,384 NZDSave up to $2,749 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
1.03ct Round
$3,384 NZD