Feldspar pseudomorph after Scapolite

Hwy. 41 roadcut, 10 km east of Griffith, Ontario

I've heard these called albite, plagioclase, and orthoclase.  No way to tell if they were originally marialite or meionite, unless there's some relict material left inside one, which I've yet to see. 

These were found up to at least 10x4cm, and some clusters were big, 20cm +.

75 x 30 mm

crystals to 30 mm