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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 $1,866 SGD
HK$11,400 HKD
As of November 1, 2026
Save $2,511 SGD (57%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $4,377 SGD at MOH London · As of November 1, 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 1, 2026, with prices from $1,866 to $4,377, a $2,511 spread on the same certified stone. MOH London lists it at $4,377. 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
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 1
Current: $4,377 SGD|Low: $1,850 SGD|High: $4,458 SGD|Avg: $2,682 SGD|-1.8%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 6$1,866 SGD
Retailer 3$1,972 SGD
Retailer 7$2,013 SGD
Retailer 8$2,499 SGD
Retailer 2$2,596 SGD
Retailer 9$2,603 SGD
Retailer 5$2,722 SGD
Retailer 4$3,389 SGD
MOH London$4,377 SGD

36 data points across 9 retailers

11 retailers$1,866 SGD to $4,377 SGD

A
Cheapest Retailer
-
$1,866 SGD
HK$11,400 HKD
A
Retailer 2
-
$1,972 SGD
₹146,858 INR
View
A
Retailer 3
-
$2,013 SGD
View
A
Retailer 4
-
$2,353 SGD
$1,840 USD
View
Retailer 5
-
$2,499 SGD
$1,954 USD
View
Price last confirmed 17 days ago
A
Retailer 6
-
$2,584 SGD
A$3,108 AUD
View
A
Retailer 7
-
$2,596 SGD
$2,030 USD
View
A
Retailer 8
-
$2,603 SGD
View
A
Retailer 9
-
$2,722 SGD
£1,676 GBP
View
B+
Retailer 10
-
$3,389 SGD
€2,524 EUR
View
Most Expensive
B
MOH London
7EE6C21E5 · Nov 1
$4,377 SGD
£2,695 GBP
View
10 more retailers have this diamond
Prices start from $1,866 SGDSave up to $2,511 SGD

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
$1,866 SGD