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Cushion|Natural|GIA

1.20ct K SI1 Cushion Natural Diamond

ID • K/SI1 • GIA 1555890599

Certificate GIA 1555890599

Diamond specifications and retailer prices

From HK$11,537 HKD
As of November 6, 2026
Save HK$15,527 HKD (57%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: HK$27,064 HKD at MOH London · As of November 2, 2026
View at MOH London

About this 1.2ct natural cushion diamond

This 1.2ct natural cushion sits in the classic one-carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1555890599. Listed at 15 retailers as of November 2, 2026, with prices from HK$11,537 to HK$27,064, a HK$15,527 spread on the same certified stone. MOH London lists it at HK$27,064. 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

1.20
Carat
K
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 1555890599
Dimensions7.26 × 5.39 × 3.65 mm
L/W Ratio1.35
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Feather, Crystal, Needle, Cloud
Top View
7.26 mm5.39 mm1.20 ctK / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 1555890599
Side View
Table 66.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 67.8%

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$27,064 HKD|Low: HK$11,537 HKD|High: HK$27,392 HKD|Avg: HK$17,444 HKD|-1.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 9HK$11,537 HKD
Retailer 2HK$12,117 HKD
Retailer 6HK$14,256 HKD
Retailer 3HK$14,985 HKD
Retailer 10HK$15,448 HKD
Retailer 5HK$16,090 HKD
Retailer 8HK$16,772 HKD
Retailer 7HK$18,849 HKD
Retailer 4HK$20,981 HKD
MOH LondonHK$27,064 HKD

26 data points across 10 retailers

15 retailersHK$11,537 HKD to HK$27,064 HKD

A
Cheapest Retailer
-
HK$11,537 HKD
A
Retailer 2
-
HK$12,117 HKD
View
B+
Retailer 3
-
HK$14,256 HKD
View
B+
Retailer 4
-
HK$14,452 HKD
View
B+
Retailer 5
-
HK$14,460 HKD
View
B+
Retailer 6
-
HK$14,985 HKD
View
Retailer 7
-
HK$15,448 HKD
View
Price last confirmed 9 days ago
B+
Retailer 8
-
HK$15,832 HKD
View
B+
Retailer 9
-
HK$16,090 HKD
View
B+
Retailer 10
-
HK$16,145 HKD
View
B+
Retailer 11
-
HK$16,529 HKD
View
B+
Retailer 12
-
HK$16,772 HKD
View
B+
Retailer 13
-
HK$18,849 HKD
View
B
Retailer 14
-
HK$20,981 HKD
View
Most Expensive
B
MOH London
4A1957514 · Nov 2
HK$27,064 HKD
£2,719 GBP
View
14 more retailers have this diamond
Prices start from HK$11,537 HKDSave up to HK$15,527 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
1.20ct Cushion
HK$11,537 HKD