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Cushion|Natural|GIA

1.21ct I SI2 Cushion Natural Diamond

ID • I/SI2 • GIA 2557315146

Certificate GIA 2557315146

Diamond specifications and retailer prices

From $1,431 USD
As of November 6, 2026
Save $2,153 USD (60%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $3,584 USD 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 SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2557315146. Listed at 15 retailers as of November 4, 2026, with prices from $1,431 to $3,584, a $2,153 spread on the same certified stone. MOH London lists it at $3,584. 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
Color
SI2
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2557315146
Dimensions7.38 × 5.50 × 3.60 mm
L/W Ratio1.34
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Feather, Cavity, Crystal, Indented Natural, Needle, Natural
Top View
7.38 mm5.50 mm1.21 ctI / SI2
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2557315146
Side View
Table 65.0%CrownGirdle: THN-XTKPavilionCulet: NoneDepth 65.4%

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: $3,584 USD|Low: $1,431 USD|High: $3,725 USD|Avg: $2,128 USD|-3.8%
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
November 6, 2026
Retailer 6$1,431 USD
Retailer 2$1,603 USD
Retailer 11$1,662 USD
Retailer 12$1,866 USD
Retailer 4$1,892 USD
Retailer 5$1,900 USD
Retailer 7$2,016 USD
Retailer 3$2,051 USD
Retailer 9$2,066 USD
Retailer 13$2,189 USD
Retailer 10$2,227 USD
Retailer 8$2,352 USD
MOH London$3,584 USD

22 data points across 13 retailers

15 retailers$1,431 USD to $3,584 USD

A
Cheapest Retailer
-
$1,431 USD
A
Retailer 2
-
$1,603 USD
View
A
Retailer 3
-
$1,662 USD
View
A
Retailer 4
-
$1,866 USD
View
A
Retailer 5
-
$1,892 USD
View
Final sale: no returns
A
Retailer 6
-
$1,900 USD
View
A
Retailer 7
-
$1,968 USD
View
A
Retailer 8
-
$2,016 USD
View
Retailer 9
-
$2,020 USD
View
Price last confirmed 30 days ago
Retailer 10
-
$2,051 USD
View
Price last confirmed 9 days ago
A
Retailer 11
-
$2,066 USD
View
B+
Retailer 12
-
$2,189 USD
View
A
Retailer 13
-
$2,227 USD
View
B+
Retailer 14
-
$2,352 USD
View
Most Expensive
B
MOH London
89D5D95D6 · Nov 4
$3,584 USD
£2,822 GBP
View
14 more retailers have this diamond
Prices start from $1,431 USDSave up to $2,153 USD

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
$1,431 USD