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Round|Natural|GIA

1.00ct J SI1 Round Natural Diamond

VG • J/SI1 • GIA 5423535519

Certificate GIA 5423535519

Diamond specifications and retailer prices

From $2,237 SGD
As of November 6, 2026
Save $3,612 SGD (62%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $5,849 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 very-good cut grade and certified by GIA 5423535519. Listed at 20 retailers as of November 5, 2026, with prices from $2,237 to $5,849, a $3,612 spread on the same certified stone. NZ Jewellers lists it at $5,849. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.00
Carat
J
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceFaint
Crown angle38.5°
Pavilion angle39.8°
OriginNatural
Grading LabGIA
CertificateGIA 5423535519
Dimensions6.30 × 6.25 × 3.97 mm
L/W Ratio1.01
Top View
6.30 mm6.25 mm1.00 ctJ / SI1
OriginNatural
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceFaint
CertificateGIA 5423535519
Side View
Table 57.0%Crown 38.5°Girdle: STK-THKPavilion 39.8°Culet: NoneDepth 63.3%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $3,260 SGD|Low: $2,009 SGD|High: $4,960 SGD|Avg: $3,202 SGD|-0.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 5, 2026
Retailer 7$2,289 SGD
Retailer 9$2,339 SGD
Retailer 8$2,357 SGD
Retailer 2$2,652 SGD
Retailer 5$3,021 SGD
Retailer 1$3,260 SGD
Retailer 4$3,414 SGD
Retailer 10$3,440 SGD
Retailer 3$3,547 SGD
Retailer 6$4,887 SGD

42 data points across 10 retailers

20 retailers$2,237 SGD to $5,849 SGD

B+
Cheapest Retailer
-
$2,237 SGD
B+
Retailer 2
-
$2,284 SGD
View
B+
Retailer 3
-
$2,289 SGD
View
B+
Retailer 4
-
$2,339 SGD
View
Final sale: no returns
B+
Retailer 5
-
$2,357 SGD
View
B+
Retailer 6
-
$2,383 SGD
View
Retailer 7
-
$2,534 SGD
View
Price last confirmed 8 days ago
B+
Retailer 8
-
$2,534 SGD
View
B
Retailer 9
-
$2,580 SGD
View
B+
Retailer 10
-
$2,652 SGD
View
B
Retailer 11
-
$2,896 SGD
View
B
Retailer 12
-
$2,924 SGD
View
B
Retailer 13
-
$3,021 SGD
View
B
Retailer 14
-
$3,221 SGD
View
B
Retailer 15
-
$3,260 SGD
View
B
Retailer 16
-
$3,414 SGD
View
Retailer 17
-
$3,440 SGD
View
Price last confirmed 31 days ago
B
Retailer 18
-
$3,547 SGD
View
B
Retailer 19
-
$4,887 SGD
View
Most Expensive
C
NZ Jewellers
9ae6d256-84b7-426f-a4bd-e2661672ff5a · Nov 5
$5,849 SGD
$4,579 USD
View
19 more retailers have this diamond
Prices start from $2,237 SGDSave up to $3,612 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.

B+
1.00ct Round
$2,237 SGD