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Round|Natural|GIA

1.21ct I SI2 Round Natural Diamond

EX • I/SI2 • GIA 2231667421

Certificate GIA 2231667421

Diamond specifications and retailer prices

From $4,064 NZD
As of November 5, 2026
Save $7,232 NZD (64%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $11,296 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 I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2231667421. Listed at 15 retailers as of November 5, 2026, with prices from $4,064 to $11,296, a $7,232 spread on the same certified stone. NZ Jewellers lists it at $11,296. 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
I
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 2231667421
Dimensions6.83 × 6.86 × 4.25 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Needle
Top View
6.83 mm6.86 mm1.21 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2231667421
Side View
Table 55.0%Crown 35.5°Girdle: THN-MEDPavilion 40.8°Culet: NoneDepth 62.1%

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 5
Current: $11,296 NZD|Low: $4,064 NZD|High: $11,296 NZD|Avg: $6,040 NZD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
November 6, 2026
Retailer 6$4,064 NZD
Retailer 7$4,746 NZD
Retailer 11$4,827 NZD
Retailer 4$5,354 NZD
Retailer 10$5,363 NZD
Retailer 12$5,363 NZD
Retailer 13$5,404 NZD
Retailer 5$5,646 NZD
Retailer 14$5,646 NZD
Retailer 2$5,742 NZD
Retailer 3$5,827 NZD
Retailer 8$5,947 NZD
Retailer 15$7,865 NZD
Retailer 9$9,012 NZD
NZ Jewellers$11,296 NZD

25 data points across 15 retailers

15 retailers$4,064 NZD to $11,296 NZD

A
Cheapest Retailer
-
$4,064 NZD
A
Retailer 2
-
$4,746 NZD
View
A
Retailer 3
-
$4,827 NZD
View
B+
Retailer 4
-
$5,354 NZD
View
B+
Retailer 5
-
$5,363 NZD
View
B+
Retailer 6
-
$5,363 NZD
View
B+
Retailer 7
-
$5,404 NZD
View
B+
Retailer 8
-
$5,646 NZD
View
B+
Retailer 9
-
$5,646 NZD
View
B+
Retailer 10
-
$5,742 NZD
View
B+
Retailer 11
-
$5,827 NZD
View
B+
Retailer 12
-
$5,947 NZD
View
B
Retailer 13
-
$7,865 NZD
View
B
Retailer 14
-
$9,012 NZD
View
Most Expensive
B
NZ Jewellers
c8614bb8-53af-487f-bd0f-6c8b45bb686f · Nov 5
$11,296 NZD
$6,262 USD
View
14 more retailers have this diamond
Prices start from $4,064 NZDSave up to $7,232 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
$4,064 NZD