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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 $1,887 SGD
As of November 6, 2026
Save $2,539 SGD (57%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $4,426 SGD 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 $1,887 to $4,426, a $2,539 spread on the same certified stone. MOH London lists it at $4,426. 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: $4,426 SGD|Low: $1,887 SGD|High: $4,479 SGD|Avg: $2,852 SGD|-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 9$1,887 SGD
Retailer 2$1,981 SGD
Retailer 6$2,331 SGD
Retailer 3$2,450 SGD
Retailer 10$2,526 SGD
Retailer 5$2,631 SGD
Retailer 8$2,743 SGD
Retailer 7$3,082 SGD
Retailer 4$3,431 SGD
MOH London$4,426 SGD

26 data points across 10 retailers

15 retailers$1,887 SGD to $4,426 SGD

A
Cheapest Retailer
-
$1,887 SGD
A
Retailer 2
-
$1,981 SGD
View
B+
Retailer 3
-
$2,331 SGD
View
B+
Retailer 4
-
$2,363 SGD
View
B+
Retailer 5
-
$2,365 SGD
View
B+
Retailer 6
-
$2,450 SGD
View
Retailer 7
-
$2,526 SGD
View
Price last confirmed 9 days ago
B+
Retailer 8
-
$2,589 SGD
View
B+
Retailer 9
-
$2,631 SGD
View
B+
Retailer 10
-
$2,640 SGD
View
B+
Retailer 11
-
$2,703 SGD
View
B+
Retailer 12
-
$2,743 SGD
View
B+
Retailer 13
-
$3,082 SGD
View
B
Retailer 14
-
$3,431 SGD
View
Most Expensive
B
MOH London
4A1957514 · Nov 2
$4,426 SGD
£2,719 GBP
View
14 more retailers have this diamond
Prices start from $1,887 SGDSave up to $2,539 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
1.20ct Cushion
$1,887 SGD