Hi family,
Since C. Arabica and the Psychotria's genre are from the same family (Rubiaceae), I decide to use the same method of propagation, and guess what I've succeeded!
I pick some healthy leaves and place it on water at room temperature ( its winter here so the temperature was around 10*c to 15*c) near a sunny window. After 2 weeks one leave developed roots.
The leaves that were on soil, with hight humidity, are still alive but no signs of root growth.
It can be concluded that the leaves of C. Arabica can be easily propagated in water with low temperatures, but perhaps higher temperatures may speed up the process...
Hope this helps someone that want to grow this specie!
Feel free to post any experiment with C. Arabica here, thanks for reading!