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1.00ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 2506134651

Shape and cutting style on the report: Round brilliant

Certificate GIA 2506134651

Diamond specifications and retailer prices

From $2,344 SGD
As of November 6, 2026
Save $4,445 SGD (65%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $6,789 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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2506134651. Listed at 21 retailers as of November 5, 2026, with prices from $2,344 to $6,789, a $4,445 spread on the same certified stone. NZ Jewellers lists it at $6,789. 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
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle35.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 2506134651
Dimensions6.39 × 6.35 × 3.99 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Top View
6.39 mm6.35 mm1.00 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2506134651
Side View
Table 57.0%Crown 35.5°Girdle: MED-STKPavilion 41°Culet: NoneDepth 62.7%

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: $2,344 SGD|Low: $2,344 SGD|High: $5,757 SGD|Avg: $3,472 SGD|-3.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 1$2,344 SGD
Retailer 7$2,386 SGD
Retailer 8$2,934 SGD
Retailer 9$2,997 SGD
Retailer 2$3,064 SGD
Retailer 3$3,416 SGD
Retailer 6$3,671 SGD
Retailer 4$3,963 SGD
Retailer 5$5,674 SGD

29 data points across 9 retailers

21 retailers$2,344 SGD to $6,789 SGD

A
Cheapest Retailer
-
$2,344 SGD
B+
Retailer 2
-
$2,386 SGD
View
B+
Retailer 3
-
$2,842 SGD
View
B+
Retailer 4
-
$2,847 SGD
View
B+
Retailer 5
-
$2,934 SGD
View
Retailer 6
-
$2,960 SGD
View
Price last confirmed 82 days ago
B
Retailer 7
-
$2,997 SGD
View
Final sale: no returns
B+
Retailer 8
-
$3,064 SGD
View
B+
Retailer 9
-
$3,219 SGD
View
B+
Retailer 10
-
$3,247 SGD
View
B
Retailer 11
-
$3,308 SGD
View
B
Retailer 12
-
$3,398 SGD
View
B+
Retailer 13
-
$3,416 SGD
View
B
Retailer 14
-
$3,426 SGD
View
Retailer 15
-
$3,638 SGD
View
Price last confirmed 30 days ago
B
Retailer 16
-
$3,671 SGD
View
B
Retailer 17
-
$3,746 SGD
View
B
Retailer 18
-
$3,963 SGD
View
B
Retailer 19
-
$4,449 SGD
View
B
Retailer 20
-
$5,674 SGD
View
Most Expensive
B
NZ Jewellers
8b7bb6df-972d-41c2-b5d1-2a135753b617 · Nov 5
$6,789 SGD
$5,315 USD
View
20 more retailers have this diamond
Prices start from $2,344 SGDSave up to $4,445 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
$2,344 SGD