Know all about Hyaloclastite and Pseudotachylite properties here. All properties of rocks are important as they define the type of rock and its application. Hyaloclastite belongs to Igneous Rocks while Pseudotachylite belongs to Metamorphic Rocks.Texture of Hyaloclastite is Pyroclastic whereas that of Pseudotachylite is Quench. Hyaloclastite appears Dull and Pseudotachylite appears Dull and Soft. The luster of Hyaloclastite is dull and grainy while that of Pseudotachylite is vitreous. Hyaloclastite is available in brown, grey, yellow colors whereas Pseudotachylite is available in black, brown, colourless, green, grey, pink, white colors. The commercial uses of Hyaloclastite are cemetery markers, creating artwork and that of Pseudotachylite are creating artwork, gemstone.