Variolite n. : A kind of diorite or diabase containing imbedded whitish spherules, which give the rock a spotted appearance.

Example:


Taxonomy
rocks, variolites, variolite, spherules, feldspar, free encyclopedia, appearance, pale green, intrusive rock, dark green, colored spots, olivine, plagioclase feldspar, igneous rocks, composition, diameter, spherulites, crystals.

Defination from the web:
variolite is an intrusive rock or a lava flow. ... Sometimes little steam cavities occur and may serve as a nucleus from which the variolite has grown. ... Retrieved from "http://en.wikipedia.org/wiki/Variolite" Categories: Igneous rocks ...