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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 $1,931 AUD
As of November 4, 2026
Save $3,153 AUD (62%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $5,084 AUD 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 $1,931 to $5,084, a $3,153 spread on the same certified stone. NZ Jewellers lists it at $5,084. 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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: $5,084 AUD|Low: $1,931 AUD|High: $5,193 AUD|Avg: $2,507 AUD|-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$1,931 AUD
Retailer 2$2,048 AUD
Retailer 11$2,061 AUD
Retailer 7$2,084 AUD
Retailer 9$2,084 AUD
Retailer 8$2,180 AUD
Retailer 10$2,221 AUD
Retailer 3$2,406 AUD
Retailer 5$2,543 AUD
Retailer 4$2,877 AUD
NZ Jewellers$5,084 AUD

43 data points across 11 retailers

11 retailers$1,931 AUD to $5,084 AUD

A
Cheapest Retailer
-
$1,931 AUD
A
Retailer 2
-
$2,048 AUD
View
A
Retailer 3
-
$2,061 AUD
View
Retailer 4
-
$2,084 AUD
View
Price last confirmed 8 days ago
A
Retailer 5
-
$2,084 AUD
View
A
Retailer 6
-
$2,180 AUD
View
A
Retailer 7
-
$2,221 AUD
View
B+
Retailer 8
-
$2,406 AUD
View
B+
Retailer 9
-
$2,543 AUD
View
B+
Retailer 10
-
$2,877 AUD
View
Most Expensive
B
NZ Jewellers
ae8f5be1-e745-4e7b-8d9d-eb4b15a6ff4c · Nov 5
$5,084 AUD
$3,559 USD
View
10 more retailers have this diamond
Prices start from $1,931 AUDSave up to $3,153 AUD

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
$1,931 AUD