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