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