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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 $1,352 USD
As of November 4, 2026
Save $2,207 USD (62%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $3,559 USD 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 $1,352 to $3,559, a $2,207 spread on the same certified stone. NZ Jewellers lists it at $3,559. 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
Color
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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: $3,559 USD|Low: $1,352 USD|High: $3,635 USD|Avg: $1,755 USD|-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$1,352 USD
Retailer 2$1,434 USD
Retailer 11$1,443 USD
Retailer 7$1,459 USD
Retailer 9$1,459 USD
Retailer 8$1,526 USD
Retailer 10$1,555 USD
Retailer 3$1,684 USD
Retailer 5$1,780 USD
Retailer 4$2,014 USD
NZ Jewellers$3,559 USD

43 data points across 11 retailers

11 retailers$1,352 USD to $3,559 USD

A
Cheapest Retailer
-
$1,352 USD
A
Retailer 2
-
$1,434 USD
View
A
Retailer 3
-
$1,443 USD
View
Retailer 4
-
$1,459 USD
View
Price last confirmed 8 days ago
A
Retailer 5
-
$1,459 USD
View
A
Retailer 6
-
$1,526 USD
View
A
Retailer 7
-
$1,555 USD
View
B+
Retailer 8
-
$1,684 USD
View
B+
Retailer 9
-
$1,780 USD
View
B+
Retailer 10
-
$2,014 USD
View
Most Expensive
B
NZ Jewellers
ae8f5be1-e745-4e7b-8d9d-eb4b15a6ff4c · Nov 5
$3,559 USD
View
10 more retailers have this diamond
Prices start from $1,352 USDSave up to $2,207 USD

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
$1,352 USD