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Round|Natural|GIA

1.21ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 6552175864

Certificate GIA 6552175864

Diamond specifications and retailer prices

From $2,298 SGD
As of November 6, 2026
Save $4,150 SGD (64%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $6,448 SGD at NZ Jewellers · As of November 2, 2026
View at NZ Jewellers

About this 1.21ct natural round diamond

This 1.21ct 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 6552175864. Listed at 18 retailers as of November 2, 2026, with prices from $2,298 to $6,448, a $4,150 spread on the same certified stone. NZ Jewellers lists it at $6,448. 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

1.21
Carat
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
Crown angle35.5°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 6552175864
Dimensions6.79 × 6.83 × 4.25 mm
L/W Ratio1.01
Girdle conditionSlightly Thick
Top View
6.79 mm6.83 mm1.21 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateGIA 6552175864
Side View
Table 57.0%Crown 35.5°Girdle: MediumPavilion 41.2°Culet: NoneDepth 62.3%

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 6
Current: $6,448 SGD|Low: $2,298 SGD|High: $6,448 SGD|Avg: $3,478 SGD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
November 6, 2026
Retailer 7$2,298 SGD
Retailer 13$2,800 SGD
Retailer 12$2,807 SGD
Retailer 6$2,845 SGD
Retailer 11$2,919 SGD
Retailer 3$3,084 SGD
Retailer 4$3,084 SGD
Retailer 2$3,226 SGD
Retailer 9$3,242 SGD
Retailer 5$3,558 SGD
Retailer 8$3,592 SGD
Retailer 14$3,790 SGD
Retailer 10$5,388 SGD
NZ Jewellers$6,448 SGD

28 data points across 14 retailers

18 retailers$2,298 SGD to $6,448 SGD

A
Cheapest Retailer
-
$2,298 SGD
B+
Retailer 2
-
$2,786 SGD
View
B+
Retailer 3
-
$2,800 SGD
View
B+
Retailer 4
-
$2,807 SGD
View
B+
Retailer 5
-
$2,845 SGD
View
Final sale: no returns
B+
Retailer 6
-
$2,908 SGD
View
B+
Retailer 7
-
$2,919 SGD
View
B+
Retailer 8
-
$3,069 SGD
View
B+
Retailer 9
-
$3,084 SGD
View
Retailer 10
-
$3,084 SGD
View
Price last confirmed 8 days ago
B+
Retailer 11
-
$3,226 SGD
View
B+
Retailer 12
-
$3,242 SGD
View
B
Retailer 13
-
$3,558 SGD
View
B+
Retailer 14
-
$3,592 SGD
View
B
Retailer 15
-
$3,790 SGD
View
Retailer 16
-
$3,796 SGD
View
Price last confirmed 30 days ago
B
Retailer 17
-
$5,388 SGD
View
Most Expensive
B
NZ Jewellers
d4b92014-6fab-4719-bdf5-d39cdee6a9a9 · Nov 2
$6,448 SGD
$5,031 USD
View
17 more retailers have this diamond
Prices start from $2,298 SGDSave up to $4,150 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
1.21ct Round
$2,298 SGD