Webster's Third New International Unabridged Dictionary

p. 1767

-phyric = combining form of "porphyritic"

porphyritic =

of or relating to porphyry;

having distinct crystals in a relatively fine-grained base


Nôvo Dicionário Appleton das Línguas Inglêsa e Portuguêsa

p. 425

porphyritic = porfírico

macroporfírico
microporfírico

These are extremely rare words even in English. You're not likely to find many examples on the Internet. You'd need an excellent, recent, Portuguese book on Geology.