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Round|Natural|GIA

1.00ct J SI2 Round Natural Diamond

EX • J/SI2 • GIA 1559567941

Certificate GIA 1559567941

Diamond specifications and retailer prices

From $2,766 AUD
As of November 6, 2026
22 retailers carry this diamond
Most expensive: $5,673 AUD at NZ Jewellers · As of October 11, 2026
View at NZ Jewellers

About this 1ct natural round diamond

This 1ct natural round sits in the classic one-carat band, graded J colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1559567941. Listed at 22 retailers as of November 6, 2026. 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

1.00
Carat
J
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 1559567941
Dimensions6.34 × 6.38 × 3.94 mm
L/W Ratio1.01
Culet sizeNone
Top View
6.34 mm6.38 mm1.00 ctJ / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1559567941
Side View
Table 58.0%Crown 36°Girdle: THN-STKPavilion 40.6°Culet: NDepth 61.9%

Caratlytics Score

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B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $5,673 AUD|Low: $2,270 AUD|High: $5,673 AUD|Avg: $2,954 AUD
NZ Jewellers
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
Retailer 16
Retailer 17
Retailer 18
October 26, 2026
Retailer 15$2,270 AUD
Retailer 13$2,271 AUD
Retailer 10$2,301 AUD
Retailer 6$2,326 AUD
Retailer 8$2,326 AUD
Retailer 16$2,386 AUD
Retailer 7$2,433 AUD
Retailer 12$2,441 AUD
Retailer 5$2,471 AUD
Retailer 9$2,683 AUD
Retailer 17$2,734 AUD
Retailer 2$2,848 AUD
Retailer 14$2,947 AUD
Retailer 4$3,010 AUD
Retailer 11$3,190 AUD
Retailer 18$3,706 AUD
Retailer 3$4,070 AUD
NZ Jewellers$5,673 AUD

32 data points across 18 retailers

22 retailers

Retailer 1
-
$2,270 AUD
Price last confirmed 13 days ago
Retailer 2
-
$2,271 AUD
View
Price last confirmed 13 days ago
Retailer 3
-
$2,301 AUD
View
Price last confirmed 11 days ago
Retailer 4
-
$2,326 AUD
View
Price last confirmed 27 days ago
Retailer 5
-
$2,326 AUD
View
Price last confirmed 25 days ago
Retailer 6
-
$2,326 AUD
View
Price last confirmed 12 days ago
Retailer 7
-
$2,326 AUD
View
Price last confirmed 15 days ago
Retailer 8
-
$2,326 AUD
View
Price last confirmed 25 days ago
Retailer 9
-
$2,386 AUD
View
Price last confirmed 10 days ago
Retailer 10
-
$2,433 AUD
View
Price last confirmed 15 days ago
Retailer 11
-
$2,441 AUD
View
Price last confirmed 11 days ago
Retailer 12
-
$2,471 AUD
View
Price last confirmed 10 days ago
Retailer 13
-
$2,683 AUD
View
Price last confirmed 26 days ago
Retailer 14
-
$2,683 AUD
View
Price last confirmed 14 days ago
Retailer 15
-
$2,734 AUD
View
Price last confirmed 13 days ago
B+
Retailer 16
-
$2,766 AUD
View
Retailer 17
-
$2,947 AUD
View
Price last confirmed 9 days ago
Retailer 18
-
$3,190 AUD
View
Price last confirmed 11 days ago
Retailer 19
-
$3,706 AUD
View
Price last confirmed 11 days ago
Retailer 20
-
$4,070 AUD
View
Price last confirmed 12 days ago
Retailer 21
-
$5,673 AUD
View
Price last confirmed 14 days ago
Most Expensive
NZ Jewellers
ac85094a-1a38-4c69-a7f7-313bfe985f19 · Oct 11
$5,673 AUD
$3,971 USD
View
Price last confirmed 26 days ago
21 more retailers have this diamond
Prices start from $2,766 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.

B+
1.00ct Round
$2,766 AUD