Know all about Hornblendite and Coal properties here. All properties of rocks are important as they define the type of rock and its application. Hornblendite belongs to Igneous Rocks while Coal belongs to Sedimentary Rocks.Texture of Hornblendite is Banded, Foliated, Massive whereas that of Coal is Amorphous, Glassy. Hornblendite appears Foliated and Coal appears Veined or Pebbled. The luster of Hornblendite is vitreous to dull while that of Coal is dull to vitreous to submetallic. Hornblendite is available in black, brown, green, grey colors whereas Coal is available in black, brown, dark brown, grey, light to dark grey colors. The commercial uses of Hornblendite are cemetery markers, commemorative tablets, creating artwork and that of Coal are alumina refineries, electricity generation, liquid fuel, manufacture of soap, solvents, dyes, plastics and fibres, paper industry.