Letters that make porphyry
o, p, h, r, y are letters that make 'porphyry'
1 possible definitions for 'porphyry'
Under this definition, porphyry is a noun and has the following properties:
porphyritic rock has the same meaning as porphyry
'porphyry' can be a type of igneous rock.
groundmass is a substance of porphyry.
porphyritic is a derivative of porphyry.