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Cushion|Natural|GIA

1.21ct I SI1 Cushion Natural Diamond

ID • I/SI1 • GIA 1309792916

Certificate GIA 1309792916

Diamond specifications and retailer prices

From $2,757 AUD
As of November 6, 2026
Save $3,716 AUD (57%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $6,473 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1309792916. Listed at 14 retailers as of November 4, 2026, with prices from $2,757 to $6,473, a $3,716 spread on the same certified stone. MOH London lists it at $6,473. 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
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceStrong
OriginNatural
Grading LabGIA
CertificateGIA 1309792916
Dimensions6.26 × 5.49 × 3.94 mm
L/W Ratio1.14
Key to symbols
Feather, Twinning Wisp, Indented Natural, Natural
Top View
6.26 mm5.49 mm1.21 ctI / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceStrong
CertificateGIA 1309792916
Side View
Table 58.0%CrownGirdle: Very ThickPavilionCulet: NoneDepth 71.8%

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: $6,473 AUD|Low: $2,738 AUD|High: $6,560 AUD|Avg: $3,996 AUD|-1.2%
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
November 7, 2026
Retailer 9$2,757 AUD
Retailer 10$3,347 AUD
Retailer 11$3,417 AUD
Retailer 3$3,473 AUD
Retailer 6$3,593 AUD
Retailer 12$3,704 AUD
Retailer 2$3,919 AUD
Retailer 4$4,004 AUD
Retailer 5$4,031 AUD
Retailer 13$4,149 AUD
Retailer 8$4,520 AUD
Retailer 7$4,601 AUD
MOH London$6,473 AUD

32 data points across 13 retailers

14 retailers$2,757 AUD to $6,473 AUD

A
Cheapest Retailer
-
$2,757 AUD
B+
Retailer 2
-
$3,346 AUD
View
B+
Retailer 3
-
$3,347 AUD
View
B+
Retailer 4
-
$3,417 AUD
View
Final sale: no returns
B+
Retailer 5
-
$3,473 AUD
View
B+
Retailer 6
-
$3,593 AUD
View
Retailer 7
-
$3,704 AUD
View
Price last confirmed 30 days ago
B+
Retailer 8
-
$3,832 AUD
View
B+
Retailer 9
-
$3,919 AUD
View
B+
Retailer 10
-
$4,031 AUD
View
Retailer 11
-
$4,149 AUD
View
Price last confirmed 31 days ago
B
Retailer 12
-
$4,520 AUD
View
B
Retailer 13
-
$4,601 AUD
View
Most Expensive
B
MOH London
BFA899C27 · Nov 4
$6,473 AUD
£3,502 GBP
View
13 more retailers have this diamond
Prices start from $2,757 AUDSave up to $3,716 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
$2,757 AUD