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Round|Natural|GIA

1.00ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 2506134651

Shape and cutting style on the report: Round brilliant

Certificate GIA 2506134651

Diamond specifications and retailer prices

From $2,621 AUD
As of November 6, 2026
Save $4,971 AUD (65%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $7,592 AUD at NZ Jewellers · As of November 5, 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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2506134651. Listed at 21 retailers as of November 5, 2026, with prices from $2,621 to $7,592, a $4,971 spread on the same certified stone. NZ Jewellers lists it at $7,592. 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
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle35.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 2506134651
Dimensions6.39 × 6.35 × 3.99 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Top View
6.39 mm6.35 mm1.00 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2506134651
Side View
Table 57.0%Crown 35.5°Girdle: MED-STKPavilion 41°Culet: NoneDepth 62.7%

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: $2,621 AUD|Low: $2,621 AUD|High: $6,438 AUD|Avg: $3,883 AUD|-3.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 1$2,621 AUD
Retailer 7$2,668 AUD
Retailer 8$3,281 AUD
Retailer 9$3,351 AUD
Retailer 2$3,427 AUD
Retailer 3$3,820 AUD
Retailer 6$4,106 AUD
Retailer 4$4,433 AUD
Retailer 5$6,345 AUD

29 data points across 9 retailers

21 retailers$2,621 AUD to $7,592 AUD

A
Cheapest Retailer
-
$2,621 AUD
B+
Retailer 2
-
$2,668 AUD
View
B+
Retailer 3
-
$3,178 AUD
View
B+
Retailer 4
-
$3,184 AUD
View
B+
Retailer 5
-
$3,281 AUD
View
Retailer 6
-
$3,310 AUD
View
Price last confirmed 82 days ago
B
Retailer 7
-
$3,351 AUD
View
Final sale: no returns
B+
Retailer 8
-
$3,427 AUD
View
B+
Retailer 9
-
$3,600 AUD
View
B+
Retailer 10
-
$3,631 AUD
View
B
Retailer 11
-
$3,700 AUD
View
B
Retailer 12
-
$3,800 AUD
View
B+
Retailer 13
-
$3,820 AUD
View
B
Retailer 14
-
$3,831 AUD
View
Retailer 15
-
$4,068 AUD
View
Price last confirmed 30 days ago
B
Retailer 16
-
$4,106 AUD
View
B
Retailer 17
-
$4,190 AUD
View
B
Retailer 18
-
$4,433 AUD
View
B
Retailer 19
-
$4,975 AUD
View
B
Retailer 20
-
$6,345 AUD
View
Most Expensive
B
NZ Jewellers
8b7bb6df-972d-41c2-b5d1-2a135753b617 · Nov 5
$7,592 AUD
$5,315 USD
View
20 more retailers have this diamond
Prices start from $2,621 AUDSave up to $4,971 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
1.00ct Round
$2,621 AUD