What is another term for a texture where some crystals are visible to the unaired eye while other are not

Are you asking what part of the eye  is it called? 

D. porphyritic The word porphyritic is a descriptive adjective that describes certain textures of rock under igneous category. This type of texture can either be aphanetic (with fine crystals that cannot be seen by an unaided eye) and phaneritic with large enough crystals visible.

To kill bacteria from our body especially from stomach