Round|Natural|GIA

1.00ct J SI2 Round Natural Diamond

EX • J/SI2 • GIA 6305896366

Certificate GIA 6305896366

Diamond specifications and retailer prices

From $1,280 USD
As of November 4, 2026
Save $2,914 USD (69%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $4,194 USD 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 4, 2026, with prices from $1,280 to $4,194, a $2,914 spread on the same certified stone. NZ Jewellers lists it at $4,194. 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
Color
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
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: $1,645 USD|Low: $1,267 USD|High: $3,049 USD|Avg: $1,834 USD|-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$1,280 USD
Retailer 8$1,508 USD
Retailer 2$1,567 USD
Retailer 11$1,587 USD
Retailer 10$1,610 USD
Retailer 1$1,645 USD
Retailer 4$1,786 USD
Retailer 3$1,799 USD
Retailer 6$1,897 USD
Retailer 5$2,170 USD
Retailer 7$3,004 USD

41 data points across 11 retailers

17 retailers$1,280 USD to $4,194 USD

A
Cheapest Retailer
-
$1,280 USD
A
Retailer 2
-
$1,508 USD
View
A
Retailer 3
-
$1,567 USD
View
A
Retailer 4
-
$1,587 USD
View
Final sale: no returns
A
Retailer 5
-
$1,610 USD
View
A
Retailer 6
-
$1,645 USD
View
Retailer 7
-
$1,720 USD
View
Price last confirmed 8 days ago
B+
Retailer 8
-
$1,720 USD
View
B+
Retailer 9
-
$1,786 USD
View
B+
Retailer 10
-
$1,799 USD
View
B+
Retailer 11
-
$1,814 USD
View
B+
Retailer 12
-
$1,856 USD
View
B+
Retailer 13
-
$1,897 USD
View
B+
Retailer 14
-
$1,984 USD
View
B+
Retailer 15
-
$2,170 USD
View
B
Retailer 16
-
$3,004 USD
View
Most Expensive
C
NZ Jewellers
184be088-16c0-4203-b2fc-8cb6bf618a2b · Nov 5
$4,194 USD
View
16 more retailers have this diamond
Prices start from $1,280 USDSave up to $2,914 USD

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
$1,280 USD