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Round|Natural|GIA

1.21ct M SI1 Round Natural Diamond

EX • M/SI1 • GIA 2556636452

Certificate GIA 2556636452

Diamond specifications and retailer prices

From $1,727 SGD
As of November 4, 2026
Save $2,819 SGD (62%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $4,546 SGD at NZ Jewellers · As of November 5, 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 M colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2556636452. Listed at 11 retailers as of November 4, 2026, with prices from $1,727 to $4,546, a $2,819 spread on the same certified stone. NZ Jewellers lists it at $4,546. 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
M
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle31.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 2556636452
Dimensions6.93 × 6.88 × 4.13 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Feather, Twinning Wisp
Top View
6.93 mm6.88 mm1.21 ctM / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2556636452
Side View
Table 59.0%Crown 31.5°Girdle: Slightly ThickPavilion 41°Culet: NoneDepth 59.8%

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 4
Current: $4,546 SGD|Low: $1,727 SGD|High: $4,643 SGD|Avg: $2,242 SGD|-2.1%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 6$1,727 SGD
Retailer 2$1,832 SGD
Retailer 11$1,843 SGD
Retailer 7$1,864 SGD
Retailer 9$1,864 SGD
Retailer 8$1,949 SGD
Retailer 10$1,986 SGD
Retailer 3$2,151 SGD
Retailer 5$2,274 SGD
Retailer 4$2,572 SGD
NZ Jewellers$4,546 SGD

43 data points across 11 retailers

11 retailers$1,727 SGD to $4,546 SGD

A
Cheapest Retailer
-
$1,727 SGD
A
Retailer 2
-
$1,832 SGD
View
A
Retailer 3
-
$1,843 SGD
View
Retailer 4
-
$1,864 SGD
View
Price last confirmed 8 days ago
A
Retailer 5
-
$1,864 SGD
View
A
Retailer 6
-
$1,949 SGD
View
A
Retailer 7
-
$1,986 SGD
View
B+
Retailer 8
-
$2,151 SGD
View
B+
Retailer 9
-
$2,274 SGD
View
B+
Retailer 10
-
$2,572 SGD
View
Most Expensive
B
NZ Jewellers
ae8f5be1-e745-4e7b-8d9d-eb4b15a6ff4c · Nov 5
$4,546 SGD
$3,559 USD
View
10 more retailers have this diamond
Prices start from $1,727 SGDSave up to $2,819 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
$1,727 SGD