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