Dear Mr. Ahmed,

I is a fine way of presenting this thin section to a group of lookers-on but it is blurred and out of focus so that it hardly can  show its diagnostic optical features.

With all reserve it could be a green amphibole (?)

H.G.Dill

For the images I would say it´s olivine or epidote, silicates.

Dear Ahmed

I think this is chlorite

Dear pouria 

I don't think so. It's not chlorite at all. It may be chloritoid or amphibole

If you pinned me down I'd say porphyroblastic actinolite

Most propably hornblende due to rombic shape

In agreement with Dr. Dill, I'd try to find a basal section of the mineral. If it is an amphibole, there's probably one in the section with the two exfoliating directions crossing out at approximately 120ºC.

mercè

probably an amphibole

I agree with those who said it is an amphibole, probably a hornblende, but a chemical analysis is needed to identify which green amphibole it is.  Microprobe would be best, given the zoning that is present, but energy dispersive spectrometry on an SEM might be sufficient, and might be more readily accessible. Determination of the optical properties (all three refractive indices, optic sign, 2V, extinction angles, and orientation of the indicatrix might also be useful. 

Fe-rich biotite should have mottled appearance in crossed polars and straight extinction. Chloritoid is present in rocks with characteristic metamorphic textures. Try for amphibole.