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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 $1,472 USD
As of November 6, 2026
Save $1,981 USD (57%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $3,453 USD 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 $1,472 to $3,453, a $1,981 spread on the same certified stone. MOH London lists it at $3,453. 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
Color
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: $3,453 USD|Low: $1,472 USD|High: $3,495 USD|Avg: $2,226 USD|-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$1,472 USD
Retailer 2$1,546 USD
Retailer 6$1,819 USD
Retailer 3$1,912 USD
Retailer 10$1,971 USD
Retailer 5$2,053 USD
Retailer 8$2,140 USD
Retailer 7$2,405 USD
Retailer 4$2,677 USD
MOH London$3,453 USD

26 data points across 10 retailers

15 retailers$1,472 USD to $3,453 USD

A
Cheapest Retailer
-
$1,472 USD
A
Retailer 2
-
$1,546 USD
View
B+
Retailer 3
-
$1,819 USD
View
B+
Retailer 4
-
$1,844 USD
View
B+
Retailer 5
-
$1,845 USD
View
B+
Retailer 6
-
$1,912 USD
View
Retailer 7
-
$1,971 USD
View
Price last confirmed 9 days ago
B+
Retailer 8
-
$2,020 USD
View
B+
Retailer 9
-
$2,053 USD
View
B+
Retailer 10
-
$2,060 USD
View
B+
Retailer 11
-
$2,109 USD
View
B+
Retailer 12
-
$2,140 USD
View
B+
Retailer 13
-
$2,405 USD
View
B
Retailer 14
-
$2,677 USD
View
Most Expensive
B
MOH London
4A1957514 · Nov 2
$3,453 USD
£2,719 GBP
View
14 more retailers have this diamond
Prices start from $1,472 USDSave up to $1,981 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
1.20ct Cushion
$1,472 USD