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Cushion|Natural|GIA

1.21ct F SI1 Cushion Natural Diamond

EX • F/SI1 • GIA 6411171191

Certificate GIA 6411171191

Diamond specifications and retailer prices

From $2,642 AUD
As of November 6, 2026
Save $3,536 AUD (57%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $6,177 AUD at MOH London · As of November 7, 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 6411171191. Listed at 14 retailers as of November 6, 2026, with prices from $2,642 to $6,177, a $3,536 spread on the same certified stone. MOH London lists it at $6,177. 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 6411171191
Dimensions6.18 × 5.94 × 4.10 mm
L/W Ratio1.04
Top View
6.18 mm5.94 mm1.21 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6411171191
Side View
Table 65.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 68.9%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $6,177 AUD|Low: $2,642 AUD|High: $6,277 AUD|Avg: $4,078 AUD|-1.6%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 7, 2026
Retailer 4$2,642 AUD
Retailer 9$2,644 AUD
Retailer 2$3,461 AUD
Retailer 3$3,751 AUD
Retailer 8$4,024 AUD
Retailer 10$4,071 AUD
Retailer 6$4,325 AUD
Retailer 5$4,403 AUD
Retailer 7$5,164 AUD
MOH London$6,177 AUD

25 data points across 10 retailers

14 retailers$2,642 AUD to $6,177 AUD

A
Cheapest Retailer
-
$2,642 AUD
A
Retailer 2
-
$2,644 AUD
View
A
Retailer 3
-
$3,461 AUD
View
A
Retailer 4
-
$3,592 AUD
View
Retailer 5
-
$3,665 AUD
View
Price last confirmed 11 days ago
B+
Retailer 6
-
$3,748 AUD
View
A
Retailer 7
-
$3,751 AUD
View
B+
Retailer 8
-
$3,956 AUD
View
B+
Retailer 9
-
$4,024 AUD
View
B+
Retailer 10
-
$4,325 AUD
View
Retailer 11
-
$4,363 AUD
View
Price last confirmed 31 days ago
B+
Retailer 12
-
$4,403 AUD
View
B+
Retailer 13
-
$5,164 AUD
View
Most Expensive
B
MOH London
63BA0D0F2 · Nov 7
$6,177 AUD
£3,342 GBP
View
13 more retailers have this diamond
Prices start from $2,642 AUDSave up to $3,536 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
$2,642 AUD