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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 $1,635 SGD
As of November 6, 2026
Save $3,722 SGD (69%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $5,357 SGD 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 $1,635 to $5,357, a $3,722 spread on the same certified stone. NZ Jewellers lists it at $5,357. 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: $2,101 SGD|Low: $1,618 SGD|High: $3,894 SGD|Avg: $2,343 SGD|-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$1,635 SGD
Retailer 8$1,926 SGD
Retailer 2$2,002 SGD
Retailer 11$2,027 SGD
Retailer 10$2,056 SGD
Retailer 1$2,101 SGD
Retailer 4$2,281 SGD
Retailer 3$2,298 SGD
Retailer 6$2,423 SGD
Retailer 5$2,772 SGD
Retailer 7$3,837 SGD

41 data points across 11 retailers

17 retailers$1,635 SGD to $5,357 SGD

A
Cheapest Retailer
-
$1,635 SGD
A
Retailer 2
-
$1,926 SGD
View
A
Retailer 3
-
$2,002 SGD
View
A
Retailer 4
-
$2,027 SGD
View
Final sale: no returns
A
Retailer 5
-
$2,056 SGD
View
A
Retailer 6
-
$2,101 SGD
View
Retailer 7
-
$2,197 SGD
View
Price last confirmed 8 days ago
B+
Retailer 8
-
$2,197 SGD
View
B+
Retailer 9
-
$2,281 SGD
View
B+
Retailer 10
-
$2,298 SGD
View
B+
Retailer 11
-
$2,317 SGD
View
B+
Retailer 12
-
$2,371 SGD
View
B+
Retailer 13
-
$2,423 SGD
View
B+
Retailer 14
-
$2,534 SGD
View
B+
Retailer 15
-
$2,772 SGD
View
B
Retailer 16
-
$3,837 SGD
View
Most Expensive
C
NZ Jewellers
184be088-16c0-4203-b2fc-8cb6bf618a2b · Nov 5
$5,357 SGD
$4,194 USD
View
16 more retailers have this diamond
Prices start from $1,635 SGDSave up to $3,722 SGD

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
$1,635 SGD