Based only on the photos I say perhaps not Diopside. Diopside from the area typically has more rounded edges on the faces.  Diopside from the area often features parting at right angles to the longer axis. This  is not uncommon in Pyroxene species like Diopside.  A photo of cleavage at least may help determine the Amphibole versus Pyroxene question.  I will take stab at Edenite as a possible candidate. More specific locality info and other diagnostic features would help narrow the field down a bit.

If this is Amphibole more sophisticated lab tested maybe required to determine the exact species