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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 HK$11,435 HKD
As of November 6, 2026
Save HK$15,141 HKD (57%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: HK$26,576 HKD 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 HK$11,435 to HK$26,576, a HK$15,141 spread on the same certified stone. MOH London lists it at HK$26,576. 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 6
Current: HK$26,576 HKD|Low: HK$11,333 HKD|High: HK$27,253 HKD|Avg: HK$16,422 HKD|-2.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 8HK$11,435 HKD
Retailer 2HK$11,983 HKD
Retailer 5HK$12,399 HKD
Retailer 9HK$15,314 HKD
Retailer 4HK$15,847 HKD
Retailer 7HK$15,910 HKD
Retailer 6HK$16,513 HKD
Retailer 3HK$20,659 HKD
MOH LondonHK$26,576 HKD

34 data points across 9 retailers

11 retailersHK$11,435 HKD to HK$26,576 HKD

A
Cheapest Retailer
-
HK$11,435 HKD
A
Retailer 2
-
HK$11,983 HKD
View
A
Retailer 3
-
HK$12,399 HKD
View
A
Retailer 4
-
HK$14,421 HKD
View
Retailer 5
-
HK$15,314 HKD
View
Price last confirmed 22 days ago
A
Retailer 6
-
HK$15,832 HKD
View
A
Retailer 7
-
HK$15,847 HKD
View
A
Retailer 8
-
HK$15,910 HKD
View
A
Retailer 9
-
HK$16,513 HKD
View
B+
Retailer 10
-
HK$20,659 HKD
View
Most Expensive
B+
MOH London
7EE6C21E5 · Nov 4
HK$26,576 HKD
£2,670 GBP
View
10 more retailers have this diamond
Prices start from HK$11,435 HKDSave up to HK$15,141 HKD

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
HK$11,435 HKD