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Cushion|Natural|GIA

1.21ct D SI1 Cushion Natural Diamond

ID • D/SI1 • GIA 1558366202

Certificate GIA 1558366202

Diamond specifications and retailer prices

From $3,614 AUD
As of November 6, 2026
Save $4,379 AUD (55%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $7,992 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 D 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 1558366202. Listed at 17 retailers as of November 4, 2026, with prices from $3,614 to $7,992, a $4,379 spread on the same certified stone. MOH London lists it at $7,992. 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
D
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 1558366202
Dimensions7.16 × 5.34 × 3.62 mm
L/W Ratio1.34
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Cavity, Indented Natural
Top View
7.16 mm5.34 mm1.21 ctD / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceMedium
CertificateGIA 1558366202
Side View
Table 67.0%CrownGirdle: THN-STKPavilionCulet: NoneDepth 67.7%

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: $7,992 AUD|Low: $3,576 AUD|High: $8,412 AUD|Avg: $5,096 AUD|-5.0%
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
November 6, 2026
Retailer 12$3,614 AUD
Retailer 2$3,772 AUD
Retailer 5$4,320 AUD
Retailer 10$4,369 AUD
Retailer 3$4,422 AUD
Retailer 13$4,635 AUD
Retailer 14$4,793 AUD
Retailer 11$4,959 AUD
Retailer 8$5,024 AUD
Retailer 4$5,123 AUD
Retailer 6$5,312 AUD
Retailer 7$5,579 AUD
Retailer 9$5,849 AUD
MOH London$7,992 AUD

29 data points across 14 retailers

17 retailers$3,614 AUD to $7,992 AUD

A
Cheapest Retailer
-
$3,614 AUD
A
Retailer 2
-
$3,772 AUD
View
B+
Retailer 3
-
$4,320 AUD
View
B+
Retailer 4
-
$4,369 AUD
View
B+
Retailer 5
-
$4,422 AUD
View
Final sale: no returns
B+
Retailer 6
-
$4,599 AUD
View
B+
Retailer 7
-
$4,635 AUD
View
Retailer 8
-
$4,793 AUD
View
Price last confirmed 9 days ago
B+
Retailer 9
-
$4,897 AUD
View
B+
Retailer 10
-
$4,959 AUD
View
B+
Retailer 11
-
$5,024 AUD
View
B+
Retailer 12
-
$5,123 AUD
View
B+
Retailer 13
-
$5,312 AUD
View
Retailer 14
-
$5,328 AUD
View
Price last confirmed 34 days ago
B+
Retailer 15
-
$5,579 AUD
View
B+
Retailer 16
-
$5,849 AUD
View
Most Expensive
B
MOH London
ED05D376F · Nov 4
$7,992 AUD
£4,324 GBP
View
16 more retailers have this diamond
Prices start from $3,614 AUDSave up to $4,379 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
$3,614 AUD