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Round|Natural|GIA

1.00ct J SI2 Round Natural Diamond

EX • J/SI2 • GIA 6441577858

Certificate GIA 6441577858

Diamond specifications and retailer prices

From $1,516 SGD
As of October 31, 2026
Save $3,626 SGD (71%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $5,142 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 6441577858. Listed at 17 retailers as of October 31, 2026, with prices from $1,516 to $5,142, a $3,626 spread on the same certified stone. NZ Jewellers lists it at $5,142. 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
PolishVery Good
SymmetryVery Good
FluorescenceStrong
Crown angle36.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 6441577858
Dimensions6.40 × 6.33 × 4.00 mm
L/W Ratio1.01
Top View
6.40 mm6.33 mm1.00 ctJ / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceStrong
CertificateGIA 6441577858
Side View
Table 56.0%Crown 36.5°Girdle: THN-STKPavilion 40.8°Culet: NoneDepth 62.9%

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: Oct 31
Current: $2,017 SGD|Low: $1,512 SGD|High: $3,739 SGD|Avg: $2,285 SGD|-1.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 5$1,516 SGD
Retailer 6$1,537 SGD
Retailer 7$1,945 SGD
Retailer 1$2,017 SGD
Retailer 2$2,312 SGD
Retailer 4$2,610 SGD
Retailer 3$3,693 SGD

35 data points across 7 retailers

17 retailers$1,516 SGD to $5,142 SGD

A
Cheapest Retailer
-
$1,516 SGD
A
Retailer 2
-
$1,537 SGD
View
Retailer 3
-
$1,898 SGD
View
Price last confirmed 82 days ago
B+
Retailer 4
-
$1,945 SGD
View
Final sale: no returns
B+
Retailer 5
-
$1,970 SGD
View
A
Retailer 6
-
$2,017 SGD
View
B+
Retailer 7
-
$2,109 SGD
View
Retailer 8
-
$2,109 SGD
View
Price last confirmed 8 days ago
B+
Retailer 9
-
$2,129 SGD
View
B+
Retailer 10
-
$2,206 SGD
View
B+
Retailer 11
-
$2,307 SGD
View
B+
Retailer 12
-
$2,312 SGD
View
B+
Retailer 13
-
$2,433 SGD
View
B+
Retailer 14
-
$2,610 SGD
View
B
Retailer 15
-
$3,693 SGD
View
B
Retailer 16
-
$3,969 SGD
View
Most Expensive
C
NZ Jewellers
cdd2c3d5-0205-49b5-b7d2-5964aef1b29c · Nov 5
$5,142 SGD
$4,026 USD
View
16 more retailers have this diamond
Prices start from $1,516 SGDSave up to $3,626 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
$1,516 SGD