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Cushion|Natural|GIA

1.21ct F SI1 Cushion Natural Diamond

EX • F/SI1 • GIA 6555373722

Certificate GIA 6555373722

Diamond specifications and retailer prices

From $2,850 AUD
As of November 6, 2026
Save $3,566 AUD (56%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: $6,416 AUD at MOH London · As of November 4, 2026
View at MOH London

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 6555373722. Listed at 23 retailers as of November 4, 2026, with prices from $2,850 to $6,416, a $3,566 spread on the same certified stone. MOH London lists it at $6,416. 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
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6555373722
Dimensions6.26 × 6.00 × 4.00 mm
L/W Ratio1.04
Girdle conditionFaceted
Top View
6.26 mm6.00 mm1.21 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6555373722
Side View
Table 64.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 66.6%

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 6
Current: $6,416 AUD|Low: $2,812 AUD|High: $6,881 AUD|Avg: $3,918 AUD|-6.8%
MOH London
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
Retailer 16
Retailer 17
Retailer 18
Retailer 19
Retailer 20
November 7, 2026
Retailer 5$2,850 AUD
Retailer 7$3,068 AUD
Retailer 19$3,133 AUD
Retailer 8$3,136 AUD
Retailer 12$3,359 AUD
Retailer 13$3,359 AUD
Retailer 11$3,378 AUD
Retailer 3$3,419 AUD
Retailer 16$3,455 AUD
Retailer 4$3,551 AUD
Retailer 6$3,557 AUD
Retailer 10$3,592 AUD
Retailer 9$3,772 AUD
Retailer 15$3,884 AUD
Retailer 14$3,930 AUD
Retailer 2$3,994 AUD
Retailer 18$4,481 AUD
Retailer 17$4,558 AUD
Retailer 20$5,849 AUD
MOH London$6,416 AUD

23 data points across 20 retailers

23 retailers$2,850 AUD to $6,416 AUD

A
Cheapest Retailer
-
$2,850 AUD
A
Retailer 2
-
$3,068 AUD
View
Final sale: no returns
A
Retailer 3
-
$3,133 AUD
View
A
Retailer 4
-
$3,136 AUD
View
A
Retailer 5
-
$3,359 AUD
View
A
Retailer 6
-
$3,359 AUD
View
A
Retailer 7
-
$3,378 AUD
View
A
Retailer 8
-
$3,419 AUD
View
A
Retailer 9
-
$3,455 AUD
View
A
Retailer 10
-
$3,551 AUD
View
A
Retailer 11
-
$3,557 AUD
View
A
Retailer 12
-
$3,592 AUD
View
A
Retailer 13
-
$3,772 AUD
View
Retailer 14
-
$3,880 AUD
View
Price last confirmed 30 days ago
B+
Retailer 15
-
$3,884 AUD
View
Retailer 16
-
$3,930 AUD
View
B+
Retailer 17
-
$3,951 AUD
View
Retailer 18
-
$3,994 AUD
View
Retailer 19
-
$4,353 AUD
View
Price last confirmed 31 days ago
B+
Retailer 20
-
$4,481 AUD
View
B+
Retailer 21
-
$4,558 AUD
View
B+
Retailer 22
-
$5,849 AUD
View
Most Expensive
B
MOH London
6AB239AD3 · Nov 4
$6,416 AUD
£3,471 GBP
View
22 more retailers have this diamond
Prices start from $2,850 AUDSave up to $3,566 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 Cushion
$2,850 AUD