Know all about Lignite and Hyaloclastite properties here. All properties of rocks are important as they define the type of rock and its application. Lignite belongs to Sedimentary Rocks while Hyaloclastite belongs to Igneous Rocks.Texture of Lignite is Amorphous, Glassy whereas that of Hyaloclastite is Pyroclastic. Lignite appears Veined or Pebbled and Hyaloclastite appears Dull. The luster of Lignite is dull to vitreous to submetallic while that of Hyaloclastite is dull and grainy. Lignite is available in black, brown, dark brown, grey, light to dark grey colors whereas Hyaloclastite is available in brown, grey, yellow colors. The commercial uses of Lignite are electricity generation and that of Hyaloclastite are cemetery markers, creating artwork.