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Round|Natural|GIA

1.00ct J SI2 Round Natural Diamond

EX • J/SI2 • GIA 6305896366

Certificate GIA 6305896366

Diamond specifications and retailer prices

From $2,277 NZD
As of November 6, 2026
Save $5,184 NZD (69%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $7,461 NZD 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 $2,277 to $7,461, a $5,184 spread on the same certified stone. NZ Jewellers lists it at $7,461. 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: $2,926 NZD|Low: $2,254 NZD|High: $5,424 NZD|Avg: $3,263 NZD|-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$2,277 NZD
Retailer 8$2,683 NZD
Retailer 2$2,788 NZD
Retailer 11$2,823 NZD
Retailer 10$2,864 NZD
Retailer 1$2,926 NZD
Retailer 4$3,177 NZD
Retailer 3$3,200 NZD
Retailer 6$3,375 NZD
Retailer 5$3,860 NZD
Retailer 7$5,344 NZD

41 data points across 11 retailers

17 retailers$2,277 NZD to $7,461 NZD

A
Cheapest Retailer
-
$2,277 NZD
A
Retailer 2
-
$2,683 NZD
View
A
Retailer 3
-
$2,788 NZD
View
A
Retailer 4
-
$2,823 NZD
View
Final sale: no returns
A
Retailer 5
-
$2,864 NZD
View
A
Retailer 6
-
$2,926 NZD
View
Retailer 7
-
$3,060 NZD
View
Price last confirmed 8 days ago
B+
Retailer 8
-
$3,060 NZD
View
B+
Retailer 9
-
$3,177 NZD
View
B+
Retailer 10
-
$3,200 NZD
View
B+
Retailer 11
-
$3,227 NZD
View
B+
Retailer 12
-
$3,302 NZD
View
B+
Retailer 13
-
$3,375 NZD
View
B+
Retailer 14
-
$3,529 NZD
View
B+
Retailer 15
-
$3,860 NZD
View
B
Retailer 16
-
$5,344 NZD
View
Most Expensive
C
NZ Jewellers
184be088-16c0-4203-b2fc-8cb6bf618a2b · Nov 5
$7,461 NZD
$4,194 USD
View
16 more retailers have this diamond
Prices start from $2,277 NZDSave up to $5,184 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
1.00ct Round
$2,277 NZD