A porphyritic texture includes two different sizes of mineral grains, the phenocrysts and the vesicles.

Name: A porphyritic texture includes two different sizes of mineral grains, the phenocrysts and the vesicles.
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A porphyritic texture includes two different sizes of mineral grains, the larger crystals are called phenocrysts, and the finer-grained matrix they are embedded in is called the groundmass or matrix, not vesicles. Vesicles are cavities left by gas bubbles.

A Porphyritic Texture Includes Two Different Sizes of Mineral Grains