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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 $2,405 NZD
As of November 4, 2026
Save $3,926 NZD (62%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $6,331 NZD 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 $2,405 to $6,331, a $3,926 spread on the same certified stone. NZ Jewellers lists it at $6,331. 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: $6,331 NZD|Low: $2,405 NZD|High: $6,466 NZD|Avg: $3,122 NZD|-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$2,405 NZD
Retailer 2$2,551 NZD
Retailer 11$2,567 NZD
Retailer 7$2,595 NZD
Retailer 9$2,595 NZD
Retailer 8$2,715 NZD
Retailer 10$2,766 NZD
Retailer 3$2,996 NZD
Retailer 5$3,166 NZD
Retailer 4$3,583 NZD
NZ Jewellers$6,331 NZD

43 data points across 11 retailers

11 retailers$2,405 NZD to $6,331 NZD

A
Cheapest Retailer
-
$2,405 NZD
A
Retailer 2
-
$2,551 NZD
View
A
Retailer 3
-
$2,567 NZD
View
Retailer 4
-
$2,595 NZD
View
Price last confirmed 8 days ago
A
Retailer 5
-
$2,595 NZD
View
A
Retailer 6
-
$2,715 NZD
View
A
Retailer 7
-
$2,766 NZD
View
B+
Retailer 8
-
$2,996 NZD
View
B+
Retailer 9
-
$3,166 NZD
View
B+
Retailer 10
-
$3,583 NZD
View
Most Expensive
B
NZ Jewellers
ae8f5be1-e745-4e7b-8d9d-eb4b15a6ff4c · Nov 5
$6,331 NZD
$3,559 USD
View
10 more retailers have this diamond
Prices start from $2,405 NZDSave up to $3,926 NZD

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
$2,405 NZD