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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 $3,279 AUD
As of November 5, 2026
Save $5,835 AUD (64%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $9,114 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 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 $3,279 to $9,114, a $5,835 spread on the same certified stone. NZ Jewellers lists it at $9,114. 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: $9,114 AUD|Low: $3,279 AUD|High: $9,114 AUD|Avg: $4,873 AUD
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$3,279 AUD
Retailer 7$3,829 AUD
Retailer 11$3,895 AUD
Retailer 4$4,320 AUD
Retailer 10$4,327 AUD
Retailer 12$4,327 AUD
Retailer 13$4,360 AUD
Retailer 5$4,555 AUD
Retailer 14$4,555 AUD
Retailer 2$4,633 AUD
Retailer 3$4,701 AUD
Retailer 8$4,798 AUD
Retailer 15$6,346 AUD
Retailer 9$7,271 AUD
NZ Jewellers$9,114 AUD

25 data points across 15 retailers

15 retailers$3,279 AUD to $9,114 AUD

A
Cheapest Retailer
-
$3,279 AUD
A
Retailer 2
-
$3,829 AUD
View
A
Retailer 3
-
$3,895 AUD
View
B+
Retailer 4
-
$4,320 AUD
View
B+
Retailer 5
-
$4,327 AUD
View
B+
Retailer 6
-
$4,327 AUD
View
B+
Retailer 7
-
$4,360 AUD
View
B+
Retailer 8
-
$4,555 AUD
View
B+
Retailer 9
-
$4,555 AUD
View
B+
Retailer 10
-
$4,633 AUD
View
B+
Retailer 11
-
$4,701 AUD
View
B+
Retailer 12
-
$4,798 AUD
View
B
Retailer 13
-
$6,346 AUD
View
B
Retailer 14
-
$7,271 AUD
View
Most Expensive
B
NZ Jewellers
c8614bb8-53af-487f-bd0f-6c8b45bb686f · Nov 5
$9,114 AUD
$6,262 USD
View
14 more retailers have this diamond
Prices start from $3,279 AUDSave up to $5,835 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
$3,279 AUD