Pumice People

Description
The Pumice People are one of two predominant races on the planet Stoneworld; the other being the Obsidian Folk. There is a longstanding enmity between the two cultures, and this aggression was exasperated when Green Lantern Hal Jordan selected one from each tribe as a representative in his new Green Lantern Corps. From the Pumice People, Hal selected a man named Aa.

Biology
As their name suggests, the Pumice People's skin is dark and abrasive in texture, like pumice.