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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 €1,318 EUR
As of November 6, 2026
Save €1,774 EUR (57%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: €3,093 EUR 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 €1,318 to €3,093, a €1,774 spread on the same certified stone. MOH London lists it at €3,093. 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: €3,093 EUR|Low: €1,318 EUR|High: €3,110 EUR|Avg: €1,962 EUR|-0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 7, 2026
Retailer 9€1,318 EUR
Retailer 3€1,385 EUR
Retailer 7€1,629 EUR
Retailer 4€1,713 EUR
Retailer 10€1,765 EUR
Retailer 6€1,839 EUR
Retailer 2€1,917 EUR
Retailer 8€2,154 EUR
Retailer 5€2,398 EUR
MOH London€3,093 EUR

27 data points across 10 retailers

15 retailers€1,318 EUR to €3,093 EUR

A
Cheapest Retailer
-
€1,318 EUR
A
Retailer 2
-
€1,385 EUR
View
B+
Retailer 3
-
€1,629 EUR
View
B+
Retailer 4
-
€1,652 EUR
View
B+
Retailer 5
-
€1,652 EUR
View
B+
Retailer 6
-
€1,713 EUR
View
Retailer 7
-
€1,765 EUR
View
Price last confirmed 9 days ago
B+
Retailer 8
-
€1,809 EUR
View
B+
Retailer 9
-
€1,839 EUR
View
B+
Retailer 10
-
€1,845 EUR
View
B+
Retailer 11
-
€1,889 EUR
View
B+
Retailer 12
-
€1,917 EUR
View
B+
Retailer 13
-
€2,154 EUR
View
B
Retailer 14
-
€2,398 EUR
View
Most Expensive
B
MOH London
4A1957514 · Nov 2
€3,093 EUR
£2,719 GBP
View
14 more retailers have this diamond
Prices start from €1,318 EURSave up to €1,774 EUR

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
€1,318 EUR