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Cushion|Natural|GIA

1.21ct F SI1 Cushion Natural Diamond

EX • F/SI1 • GIA 2307390593

Certificate GIA 2307390593

Diamond specifications and retailer prices

From $5,627 AUD
As of November 5, 2026
Save $3,240 AUD (37%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $8,867 AUD at Steven Stone · As of November 7, 2026
View at Steven Stone

About this 1.21ct natural cushion diamond

This 1.21ct natural cushion sits in the classic one-carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2307390593. Listed at 8 retailers as of November 5, 2026, with prices from $5,627 to $8,867, a $3,240 spread on the same certified stone. Steven Stone lists it at $8,867. 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
F
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2307390593
Dimensions6.26 × 5.78 × 3.92 mm
L/W Ratio1.08
Top View
6.26 mm5.78 mm1.21 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2307390593
Side View
Table 59.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 67.9%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: $7,840 AUD|Low: $5,212 AUD|High: $8,867 AUD|Avg: $6,912 AUD|+0.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Steven Stone
November 7, 2026
Retailer 6$5,627 AUD
Retailer 2$5,733 AUD
Retailer 4$7,335 AUD
Retailer 5$7,335 AUD
Retailer 3$7,583 AUD
Retailer 1$7,840 AUD
Steven Stone$8,867 AUD

36 data points across 7 retailers

8 retailers$5,627 AUD to $8,867 AUD

B+
Cheapest Retailer
-
$5,627 AUD
B+
Retailer 2
-
$5,733 AUD
View
Final sale: no returns
B
Retailer 3
-
$5,954 AUD
View
B
Retailer 4
-
$7,335 AUD
View
B
Retailer 5
-
$7,335 AUD
View
B
Retailer 6
-
$7,583 AUD
View
B
Retailer 7
-
$7,840 AUD
View
Most Expensive
Steven Stone
6936280 · Nov 7
$8,867 AUD
£4,797 GBP
View
7 more retailers have this diamond
Prices start from $5,627 AUDSave up to $3,240 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.

B+
1.21ct Cushion
$5,627 AUD