Know all about Syenite and Obsidian properties here. All properties of rocks are important as they define the type of rock and its application. Syenite and Obsidian belong to Igneous Rocks.Texture of Syenite is Earthy whereas that of Obsidian is Glassy. Syenite appears Banded and Foilated and Obsidian appears Shiny. The luster of Syenite is subvitreous to dull while that of Obsidian is vitreous. Syenite is available in brown, buff, cream, green, grey, pink, white colors whereas Obsidian is available in black, blue, brown, green, orange, red, tan, yellow colors. The commercial uses of Syenite are cemetery markers, creating artwork and that of Obsidian are creating artwork, mirror, used in aquariums.