Know all about Anthracite and Obsidian properties here. All properties of rocks are important as they define the type of rock and its application. Anthracite belongs to Metamorphic Rocks while Obsidian belongs to Igneous Rocks.Texture of Anthracite is Amorphous, Glassy whereas that of Obsidian is Glassy. Anthracite appears Veined or Pebbled and Obsidian appears Shiny. The luster of Anthracite is shiny while that of Obsidian is vitreous. Anthracite is available in black, brown, dark brown, grey, light to dark grey colors whereas Obsidian is available in black, blue, brown, green, orange, red, tan, yellow colors. The commercial uses of Anthracite are alumina refineries, electricity generation, liquid fuel, manufacture of soap, solvents, dyes, plastics and fibres, paper industry and that of Obsidian are creating artwork, mirror, used in aquariums.