CaratHunter
Plans
Round|Natural|GIA

1.00ct J SI2 Round Natural Diamond

EX • J/SI2 • GIA 6305896366

Certificate GIA 6305896366

Diamond specifications and retailer prices

From $1,828 AUD
As of November 6, 2026
Save $4,163 AUD (69%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $5,991 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 SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6305896366. Listed at 17 retailers as of November 5, 2026, with prices from $1,828 to $5,991, a $4,163 spread on the same certified stone. NZ Jewellers lists it at $5,991. 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
SymmetryVery Good
FluorescenceNone
Crown angle36°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 6305896366
Dimensions6.40 × 6.34 × 3.94 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Top View
6.40 mm6.34 mm1.00 ctJ / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6305896366
Side View
Table 59.0%Crown 36°Girdle: ThickPavilion 40.6°Culet: NoneDepth 61.8%

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: $2,350 AUD|Low: $1,810 AUD|High: $4,355 AUD|Avg: $2,620 AUD|-1.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 9$1,828 AUD
Retailer 8$2,154 AUD
Retailer 2$2,238 AUD
Retailer 11$2,267 AUD
Retailer 10$2,300 AUD
Retailer 1$2,350 AUD
Retailer 4$2,551 AUD
Retailer 3$2,570 AUD
Retailer 6$2,710 AUD
Retailer 5$3,100 AUD
Retailer 7$4,291 AUD

41 data points across 11 retailers

17 retailers$1,828 AUD to $5,991 AUD

A
Cheapest Retailer
-
$1,828 AUD
A
Retailer 2
-
$2,154 AUD
View
A
Retailer 3
-
$2,238 AUD
View
A
Retailer 4
-
$2,267 AUD
View
Final sale: no returns
A
Retailer 5
-
$2,300 AUD
View
A
Retailer 6
-
$2,350 AUD
View
Retailer 7
-
$2,457 AUD
View
Price last confirmed 8 days ago
B+
Retailer 8
-
$2,457 AUD
View
B+
Retailer 9
-
$2,551 AUD
View
B+
Retailer 10
-
$2,570 AUD
View
B+
Retailer 11
-
$2,591 AUD
View
B+
Retailer 12
-
$2,651 AUD
View
B+
Retailer 13
-
$2,710 AUD
View
B+
Retailer 14
-
$2,834 AUD
View
B+
Retailer 15
-
$3,100 AUD
View
B
Retailer 16
-
$4,291 AUD
View
Most Expensive
C
NZ Jewellers
184be088-16c0-4203-b2fc-8cb6bf618a2b · Nov 5
$5,991 AUD
$4,194 USD
View
16 more retailers have this diamond
Prices start from $1,828 AUDSave up to $4,163 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
$1,828 AUD