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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 $2,680 AUD
As of November 4, 2026
Save $2,177 AUD (45%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $4,857 AUD 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 4, 2026, with prices from $2,680 to $4,857, a $2,177 spread on the same certified stone. Helzberg Diamonds lists it at $4,857. 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 4
Current: $4,857 AUD|Low: $2,680 AUD|High: $5,197 AUD|Avg: $3,527 AUD|-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 5$2,680 AUD
Retailer 13$2,756 AUD
Retailer 4$2,787 AUD
Retailer 12$2,824 AUD
Retailer 7$2,876 AUD
Retailer 9$2,928 AUD
Retailer 6$2,943 AUD
Retailer 3$2,951 AUD
Retailer 14$3,231 AUD
Retailer 2$3,428 AUD
Retailer 15$3,468 AUD
Retailer 11$3,891 AUD
Retailer 10$4,131 AUD
Retailer 8$4,415 AUD
Helzberg Diamonds$4,857 AUD

20 data points across 15 retailers

15 retailers$2,680 AUD to $4,857 AUD

A
Cheapest Retailer
-
$2,680 AUD
B+
Retailer 2
-
$2,756 AUD
View
B+
Retailer 3
-
$2,787 AUD
View
B+
Retailer 4
-
$2,824 AUD
View
B+
Retailer 5
-
$2,876 AUD
View
B+
Retailer 6
-
$2,928 AUD
View
B+
Retailer 7
-
$2,943 AUD
View
B+
Retailer 8
-
$2,951 AUD
View
B+
Retailer 9
-
$3,231 AUD
View
B
Retailer 10
-
$3,428 AUD
View
B+
Retailer 11
-
$3,468 AUD
View
B+
Retailer 12
-
$3,891 AUD
View
B
Retailer 13
-
$4,131 AUD
View
B
Retailer 14
-
$4,415 AUD
View
Most Expensive
B
Helzberg Diamonds
XZRILMMMKNJHI · Nov 6
$4,857 AUD
$3,400 USD
View
14 more retailers have this diamond
Prices start from $2,680 AUDSave up to $2,177 AUD

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
$2,680 AUD