Question

Pumice, obsidian, and basalt glass all have what kind of texture?

Answer 1

These are igneous rocks.

Explanation:

Pumice belongs to igneous rocks. It is porous (it includes void volüme inside).

Obsidian is dense compared to pumice. Both pumice and obsidian are glassy (amorphous,non-crystalline, and having non-discernable mineral proportions).

Basalts belong to extrusive-fine igneous rock group. Basalts have feldpars, highly mafic minerals, and few dark minerals. Basalts are fine (granular) extrusive igneous rocks.