rock so closely grained that its individual crystals cannot be seen by the unaided eye
Origin of aphaniteClassical Greek aphan?s, invisible ; from a-, not + base of phainein, to appear (see fantasy) + -ite
A dense, homogeneous rock with constituents so fine that they cannot be seen by the naked eye.
Origin of aphaniteFrom Greek aphan&emacron;s, unseen : a-, not; see a–1 + phainesthai, phan-, to appear, passive of phainein, to show; see phenomenon.
From Ancient Greek ἀφανής (aphanēs, “indistinct, unseen, obscure”).