How to pronounce porphyry
Natalie Ross
Published Feb 19, 2026
What does porphyry mean?
feldspar minerals(A porphyry is an igneous rock containing conspicuous crystals, called phenocrysts, surrounded by a matrix of finer-grained minerals or glass or both.) In most rocks, both alkali and plagioclase feldspars occur as irregularly shaped grains with only a few or no crystal faces.