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Cushion|Natural|GIA

1.21ct I SI2 Cushion Natural Diamond

ID • I/SI2 • GIA 1558540135

Certificate GIA 1558540135

Diamond specifications and retailer prices

From $1,459 USD
As of November 6, 2026
Save $1,932 USD (57%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $3,391 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 1558540135. Listed at 11 retailers as of November 4, 2026, with prices from $1,459 to $3,391, a $1,932 spread on the same certified stone. MOH London lists it at $3,391. 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
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 1558540135
Dimensions7.33 × 5.46 × 3.68 mm
L/W Ratio1.34
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Needle
Top View
7.33 mm5.46 mm1.21 ctI / SI2
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 1558540135
Side View
Table 67.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 67.4%

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: $3,391 USD|Low: $1,446 USD|High: $3,477 USD|Avg: $2,095 USD|-2.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 8$1,459 USD
Retailer 2$1,529 USD
Retailer 5$1,582 USD
Retailer 9$1,954 USD
Retailer 4$2,022 USD
Retailer 7$2,030 USD
Retailer 6$2,107 USD
Retailer 3$2,636 USD
MOH London$3,391 USD

34 data points across 9 retailers

11 retailers$1,459 USD to $3,391 USD

A
Cheapest Retailer
-
$1,459 USD
A
Retailer 2
-
$1,529 USD
View
A
Retailer 3
-
$1,582 USD
View
A
Retailer 4
-
$1,840 USD
View
Retailer 5
-
$1,954 USD
View
Price last confirmed 22 days ago
A
Retailer 6
-
$2,020 USD
View
A
Retailer 7
-
$2,022 USD
View
A
Retailer 8
-
$2,030 USD
View
A
Retailer 9
-
$2,107 USD
View
B+
Retailer 10
-
$2,636 USD
View
Most Expensive
B+
MOH London
7EE6C21E5 · Nov 4
$3,391 USD
£2,670 GBP
View
10 more retailers have this diamond
Prices start from $1,459 USDSave up to $1,932 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
$1,459 USD