What mineral has non metallic luster and is black?

One mineral that has a non-metallic luster and is black is obsidian. Obsidian is a volcanic glass formed from rapidly cooled lava, and it typically exhibits a smooth, shiny surface. Its black color can be attributed to the presence of iron and magnesium in its composition. Unlike metallic minerals, obsidian does not have a metallic sheen, making it easily recognizable.