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Round|Natural|GIA

1.21ct J SI2 Round Natural Diamond

EX • J/SI2 • GIA 1559331104

Certificate GIA 1559331104

Diamond specifications and retailer prices

From $2,949 SGD
$2,307 USD
As of October 31, 2026
Save $1,837 SGD (38%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $4,787 SGD at Yorxs · As of November 1, 2026
View at Yorxs

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 SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1559331104. Listed at 12 retailers as of October 31, 2026, with prices from $2,949 to $4,787, a $1,837 spread on the same certified stone. Yorxs lists it at $4,787. 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
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 1559331104
Dimensions6.77 × 6.80 × 4.26 mm
L/W Ratio1.00
Culet sizeNone
Top View
6.77 mm6.80 mm1.21 ctJ / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1559331104
Side View
Table 57.0%Crown 36.5°Girdle: MED-STKPavilion 41°Culet: NoneDepth 62.7%

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: Oct 31
Current: $2,955 SGD|Low: $2,244 SGD|High: $4,787 SGD|Avg: $2,912 SGD|-5.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Yorxs
November 1, 2026
Retailer 12$2,244 SGD
Retailer 3$2,282 SGD
Retailer 11$2,302 SGD
Retailer 9$2,425 SGD
Retailer 10$2,443 SGD
Retailer 8$2,457 SGD
Retailer 5$2,700 SGD
Retailer 7$2,928 SGD
Retailer 4$2,945 SGD
Retailer 1$2,955 SGD
Retailer 2$3,764 SGD
Retailer 6$4,042 SGD
Yorxs$4,787 SGD

34 data points across 13 retailers

12 retailers$2,949 SGD to $4,787 SGD

Retailer 1
-
$2,244 SGD
Price last confirmed 10 days ago
Retailer 2
-
$2,282 SGD
$1,785 USD
View
Price last confirmed 12 days ago
Retailer 3
-
$2,302 SGD
$1,801 USD
View
Price last confirmed 15 days ago
Retailer 4
-
$2,425 SGD
£1,494 GBP
View
Price last confirmed 13 days ago
Retailer 5
-
$2,443 SGD
$1,911 USD
View
Price last confirmed 13 days ago
Retailer 6
-
$2,457 SGD
View
Price last confirmed 12 days ago
Retailer 7
-
$2,700 SGD
$2,112 USD
View
Price last confirmed 12 days ago
B+
Retailer 8
-
$2,949 SGD
$2,307 USD
View
Retailer 9
-
$2,955 SGD
£1,820 GBP
View
Price last confirmed 12 days ago
Retailer 10
-
$3,764 SGD
$2,944 USD
View
Price last confirmed 13 days ago
Retailer 11
-
$4,042 SGD
$3,162 USD
View
Price last confirmed 12 days ago
Most Expensive
B
Yorxs
E25410B · Nov 1
$4,787 SGD
€3,566 EUR
View
11 more retailers have this diamond
Prices start from $2,949 SGDSave up to $1,837 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+
1.21ct Round
$2,949 SGD